diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/BirthdayCalendarGenerator.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/BirthdayCalendarGenerator.php
index 49793b0d4..11ae8be14 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/BirthdayCalendarGenerator.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/BirthdayCalendarGenerator.php
@@ -95,7 +95,7 @@ class BirthdayCalendarGenerator
             // We've seen clients (ez-vcard) putting "BDAY:" properties
             // without a value into vCards. If we come across those, we'll
             // skip them.
-            if (empty($object->BDAY->getValue())) {
+            if ('' === $object->BDAY->getValue()) {
                 continue;
             }
 
@@ -116,7 +116,7 @@ class BirthdayCalendarGenerator
             // Skip if we can't parse the BDAY value.
             try {
                 $dateParts = DateTimeParser::parseVCardDateTime($object->BDAY->getValue());
-            } catch (InvalidDataException $e) {
+            } catch (InvalidDataException) {
                 continue;
             }
 
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Cli.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Cli.php
index 69af6f470..386cf2c73 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Cli.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Cli.php
@@ -92,7 +92,7 @@ class Cli
         // @codeCoverageIgnoreEnd
 
         try {
-            list($options, $positional) = $this->parseArguments($argv);
+            [$options, $positional] = $this->parseArguments($argv);
 
             if (isset($options['q'])) {
                 $this->quiet = true;
@@ -110,27 +110,10 @@ class Cli
 
                         return 0;
                     case 'format':
-                        switch ($value) {
-                            // jcard/jcal documents
-                            case 'jcard':
-                            case 'jcal':
-                                // specific document versions
-                            case 'vcard21':
-                            case 'vcard30':
-                            case 'vcard40':
-                            case 'icalendar20':
-                                // specific formats
-                            case 'json':
-                            case 'mimedir':
-                                // icalendar/vcard
-                            case 'icalendar':
-                            case 'vcard':
-                                $this->format = $value;
-                                break;
-
-                            default:
-                                throw new \InvalidArgumentException('Unknown format: '.$value);
-                        }
+                        $this->format = match ($value) {
+                            'jcard', 'jcal', 'vcard21', 'vcard30', 'vcard40', 'icalendar20', 'json', 'mimedir', 'icalendar', 'vcard' => $value,
+                            default => throw new \InvalidArgumentException('Unknown format: '.$value),
+                        };
                         break;
                     case 'pretty':
                         $this->pretty = true;
@@ -139,28 +122,11 @@ class Cli
                         $this->forgiving = true;
                         break;
                     case 'inputformat':
-                        switch ($value) {
-                            // json formats
-                            case 'jcard':
-                            case 'jcal':
-                            case 'json':
-                                $this->inputFormat = 'json';
-                                break;
-
-                                // mimedir formats
-                            case 'mimedir':
-                            case 'icalendar':
-                            case 'vcard':
-                            case 'vcard21':
-                            case 'vcard30':
-                            case 'vcard40':
-                            case 'icalendar20':
-                                $this->inputFormat = 'mimedir';
-                                break;
-
-                            default:
-                                throw new \InvalidArgumentException('Unknown format: '.$value);
-                        }
+                        $this->inputFormat = match ($value) {
+                            'jcard', 'jcal', 'json' => 'json',
+                            'mimedir', 'icalendar', 'vcard', 'vcard21', 'vcard30', 'vcard40', 'icalendar20' => 'mimedir',
+                            default => throw new \InvalidArgumentException('Unknown format: '.$value),
+                        };
                         break;
                     default:
                         throw new \InvalidArgumentException('Unknown option: '.$name);
@@ -181,7 +147,7 @@ class Cli
                 throw new \InvalidArgumentException('Too many arguments');
             }
 
-            if (!in_array($positional[0], ['validate', 'repair', 'convert', 'color'])) {
+            if (!in_array($positional[0], ['validate', 'repair', 'convert', 'color'], true)) {
                 throw new \InvalidArgumentException('Unknown command: '.$positional[0]);
             }
         } catch (\InvalidArgumentException $e) {
@@ -201,14 +167,14 @@ class Cli
         }
 
         if (null === $this->inputFormat) {
-            if ('.json' === substr($this->inputPath, -5)) {
+            if (str_ends_with($this->inputPath, '.json')) {
                 $this->inputFormat = 'json';
             } else {
                 $this->inputFormat = 'mimedir';
             }
         }
         if (null === $this->format) {
-            if ('.json' === substr($this->outputPath, -5)) {
+            if (str_ends_with($this->outputPath, '.json')) {
                 $this->format = 'json';
             } else {
                 $this->format = 'mimedir';
@@ -219,12 +185,13 @@ class Cli
 
         try {
             while ($input = $this->readInput()) {
+                // @phpstan-ignore method.dynamicName
                 $returnCode = $this->$command($input);
                 if (0 !== $returnCode) {
                     $realCode = $returnCode;
                 }
             }
-        } catch (EofException $e) {
+        } catch (EofException) {
             // end of file
         } catch (\Exception $e) {
             $this->log('Error: '.$e->getMessage(), 'red');
@@ -408,7 +375,7 @@ HELP
             }
             fwrite($this->stdout, json_encode($vObj->jsonSerialize(), $jsonOptions));
         } else {
-            fwrite($this->stdout, $vObj->serialize());
+            fwrite($this->stdout, (string) $vObj->serialize());
         }
 
         return 0;
@@ -538,7 +505,7 @@ HELP
         $this->cWrite('red', ':');
 
         if ($property instanceof Property\Binary) {
-            $this->cWrite('default', 'embedded binary stripped. ('.strlen($property->getValue()).' bytes)');
+            $this->cWrite('default', 'embedded binary stripped. ('.strlen((string) $property->getValue()).' bytes)');
         } else {
             $parts = $property->getParts();
             $first1 = true;
@@ -593,17 +560,17 @@ HELP
 
             $v = $argv[$ii];
 
-            if ('--' === substr($v, 0, 2)) {
+            if (str_starts_with((string) $v, '--')) {
                 // This is a long-form option.
-                $optionName = substr($v, 2);
+                $optionName = substr((string) $v, 2);
                 $optionValue = true;
                 if (strpos($optionName, '=')) {
-                    list($optionName, $optionValue) = explode('=', $optionName);
+                    [$optionName, $optionValue] = explode('=', $optionName);
                 }
                 $options[$optionName] = $optionValue;
-            } elseif ('-' === substr($v, 0, 1) && strlen($v) > 1) {
+            } elseif (str_starts_with((string) $v, '-') && strlen((string) $v) > 1) {
                 // This is a short-form option.
-                foreach (str_split(substr($v, 1)) as $option) {
+                foreach (str_split(substr((string) $v, 1)) as $option) {
                     $options[$option] = true;
                 }
             } else {
@@ -628,6 +595,9 @@ HELP
         if (!$this->parser) {
             if ('-' !== $this->inputPath) {
                 $this->stdin = fopen($this->inputPath, 'r');
+                if (false === $this->stdin) {
+                    throw new InvalidDataException('Cannot open "'.$this->inputPath);
+                }
             }
 
             if ('mimedir' === $this->inputFormat) {
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Component.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Component.php
index 95bde3d40..0849c5a8e 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Component.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Component.php
@@ -140,7 +140,7 @@ class Component extends Node
             // If there's no dot in the name, it's an exact property name,
             // we can just wipe out all those properties.
             //
-            if (false === strpos($item, '.')) {
+            if (!str_contains($item, '.')) {
                 unset($this->children[strtoupper($item)]);
 
                 return;
@@ -210,8 +210,8 @@ class Component extends Node
     {
         $group = null;
         $name = strtoupper($name);
-        if (false !== strpos($name, '.')) {
-            list($group, $name) = explode('.', $name, 2);
+        if (str_contains($name, '.')) {
+            [$group, $name] = explode('.', $name, 2);
         }
         if ('' === $name) {
             $name = null;
@@ -222,16 +222,14 @@ class Component extends Node
 
             if (is_null($group)) {
                 return $result;
-            } else {
-                // If we have a group filter as well, we need to narrow it down
-                // more.
-                return array_filter(
-                    $result,
-                    function ($child) use ($group) {
-                        return $child instanceof Property && (null !== $child->group ? strtoupper($child->group) : '') === $group;
-                    }
-                );
             }
+
+            // If we have a group filter as well, we need to narrow it down
+            // more.
+            return array_filter(
+                $result,
+                fn ($child) => $child instanceof Property && (null !== $child->group ? strtoupper($child->group) : '') === $group
+            );
         }
 
         // If we got to this point, it means there was no 'name' specified for
@@ -368,7 +366,7 @@ class Component extends Node
 
         $writer->startElement(strtolower($this->name));
 
-        if (!empty($properties)) {
+        if ([] !== $properties) {
             $writer->startElement('properties');
 
             foreach ($properties as $property) {
@@ -378,7 +376,7 @@ class Component extends Node
             $writer->endElement();
         }
 
-        if (!empty($components)) {
+        if ([] !== $components) {
             $writer->startElement('components');
 
             foreach ($components as $component) {
@@ -422,13 +420,12 @@ class Component extends Node
         $matches = $this->select($name);
         if (0 === count($matches)) {
             return null;
-        } else {
-            $firstMatch = current($matches);
-            /* @var $firstMatch Property */
-            $firstMatch->setIterator(new ElementList(array_values($matches)));
-
-            return $firstMatch;
         }
+        $firstMatch = current($matches);
+        /* @var $firstMatch Property */
+        $firstMatch->setIterator(new ElementList(array_values($matches)));
+
+        return $firstMatch;
     }
 
     /**
@@ -542,7 +539,7 @@ class Component extends Node
         $messages = [];
 
         foreach ($this->children() as $child) {
-            $name = strtoupper($child->name);
+            $name = strtoupper((string) $child->name);
             if (!isset($propertyCounters[$name])) {
                 $propertyCounters[$name] = 1;
             } else {
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Component/VAlarm.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Component/VAlarm.php
index abe61768e..47474dfbf 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Component/VAlarm.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Component/VAlarm.php
@@ -32,9 +32,9 @@ class VAlarm extends VObject\Component
     public function getEffectiveTriggerTime(): \DateTimeImmutable
     {
         $trigger = $this->TRIGGER;
-        if (!isset($trigger['VALUE']) || ($trigger['VALUE'] && 'DURATION' === strtoupper($trigger['VALUE']))) {
+        if (!isset($trigger['VALUE']) || ($trigger['VALUE'] && 'DURATION' === strtoupper((string) $trigger['VALUE']))) {
             $triggerDuration = VObject\DateTimeParser::parseDuration($this->TRIGGER);
-            $related = (isset($trigger['RELATED']) && 'END' == strtoupper($trigger['RELATED'])) ? 'END' : 'START';
+            $related = (isset($trigger['RELATED']) && 'END' === strtoupper($trigger['RELATED'])) ? 'END' : 'START';
 
             /** @var VEvent|VTodo $parentComponent */
             $parentComponent = $this->parent;
@@ -96,9 +96,9 @@ class VAlarm extends VObject\Component
             }
 
             return false;
-        } else {
-            return $start <= $effectiveTrigger && $end > $effectiveTrigger;
         }
+
+        return $start <= $effectiveTrigger && $end > $effectiveTrigger;
     }
 
     /**
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Component/VAvailability.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Component/VAvailability.php
index ff6e9bd65..a4db47642 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Component/VAvailability.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Component/VAvailability.php
@@ -33,7 +33,7 @@ class VAvailability extends VObject\Component
      */
     public function isInTimeRange(\DateTimeInterface $start, \DateTimeInterface $end): bool
     {
-        list($effectiveStart, $effectiveEnd) = $this->getEffectiveStartEnd();
+        [$effectiveStart, $effectiveEnd] = $this->getEffectiveStartEnd();
 
         return
             (is_null($effectiveStart) || $start < $effectiveEnd)
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Component/VCalendar.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Component/VCalendar.php
index 7b6e66e88..879fcee29 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Component/VCalendar.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Component/VCalendar.php
@@ -145,6 +145,10 @@ class VCalendar extends VObject\Document
 
         // Additions from draft-daboo-calendar-availability-05
         'BUSYTYPE' => Property\Text::class,
+
+        // RFC 7986 properties
+        'NAME' => Property\FlatText::class,
+        'COLOR' => Property\FlatText::class,
     ];
 
     /**
@@ -164,7 +168,7 @@ class VCalendar extends VObject\Document
      *
      * @param string|null $componentName filter by component name
      *
-     * @return VObject\Component[]
+     * @return Component[]
      */
     public function getBaseComponents(?string $componentName = null): array
     {
@@ -327,7 +331,7 @@ class VCalendar extends VObject\Document
         foreach ($recurringEvents as $events) {
             try {
                 $it = new EventIterator($events, null, $timeZone);
-            } catch (NoInstancesException $e) {
+            } catch (NoInstancesException) {
                 // This event is recurring, but it doesn't have a single
                 // instance. We are skipping this event from the output
                 // entirely.
@@ -379,6 +383,18 @@ class VCalendar extends VObject\Document
 
             'CALSCALE' => '?',
             'METHOD' => '?',
+
+            // RFC 7986 calendar properties
+            'UID' => '?',
+            'LAST-MODIFIED' => '?',
+            'URL' => '?',
+            'REFRESH-INTERVAL' => '?',
+            'SOURCE' => '?',
+            'COLOR' => '?',
+            'NAME' => '*',
+            'DESCRIPTION' => '*',
+            'CATEGORIES' => '*',
+            'IMAGE' => '*',
         ];
     }
 
@@ -424,7 +440,7 @@ class VCalendar extends VObject\Document
             if ($child instanceof Component) {
                 ++$componentsFound;
 
-                if (!in_array($child->name, ['VEVENT', 'VTODO', 'VJOURNAL'])) {
+                if (!in_array($child->name, ['VEVENT', 'VTODO', 'VJOURNAL'], true)) {
                     continue;
                 }
                 $componentTypes[] = $child->name;
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Component/VCard.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Component/VCard.php
index 9ec4c88cc..62223aaeb 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Component/VCard.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Component/VCard.php
@@ -132,6 +132,13 @@ class VCard extends VObject\Document
         'ORG-DIRECTORY' => VObject\Property\FlatText::class,
 
         'X-CRYPTO' => VObject\Property\XCrypto::class,
+
+        // rfc9554 properties
+        'CREATED' => VObject\Property\VCard\TimeStamp::class,
+        'GRAMGENDER' => VObject\Property\FlatText::class,
+        'LANGUAGE' => VObject\Property\VCard\LanguageTag::class,
+        'PRONOUNS' => VObject\Property\FlatText::class,
+        'SOCIALPROFILE' => VObject\Property\Uri::class,
     ];
 
     /**
@@ -326,6 +333,11 @@ class VCard extends VObject\Document
             'CALURI' => '*',
             'CATEGORIES' => '*',
             'CLIENTPIDMAP' => '*',
+            'CREATED' => '?',
+            'GRAMGENDER' => '*',
+            'LANGUAGE' => '?',
+            'PRONOUNS' => '*',
+            'SOCIALPROFILE' => '*',
             'EMAIL' => '*',
             'FBURL' => '*',
             'IMPP' => '*',
@@ -411,6 +423,34 @@ class VCard extends VObject\Document
         return null;
     }
 
+    /**
+     * Returns a property with a specific TYPE value (ADR, TEL, or EMAIL).
+     *
+     * This function will return null if the exact property list does not exist.
+     *
+     * For example to get the property of `TEL;TYPE=HOME,CELL`
+     * you would call `getByTypes('TEL', ['HOME', 'CELL'])`
+     *
+     * @param string[] $types
+     *
+     * @return \ArrayAccess|array|null
+     */
+    public function getByTypes(string $propertyName, array $types)
+    {
+        $types = array_map(strtolower(...), $types);
+        foreach ($this->select($propertyName) as $field) {
+            if (isset($field['TYPE'])) {
+                $parts = array_map(strtolower(...), $field['TYPE']->getParts());
+
+                if (!array_diff($types, $parts) && !array_diff($parts, $types)) {
+                    return $field;
+                }
+            }
+        }
+
+        return null;
+    }
+
     /**
      * This method should return a list of default property values.
      */
@@ -453,11 +493,9 @@ class VCard extends VObject\Document
         $propertiesByGroup = [];
 
         foreach ($this->children() as $property) {
-            $group = $property->group;
+            $group = $property->group ?? '';
 
-            if (!isset($propertiesByGroup[$group])) {
-                $propertiesByGroup[$group] = [];
-            }
+            $propertiesByGroup[$group] ??= [];
 
             $propertiesByGroup[$group][] = $property;
         }
@@ -465,9 +503,9 @@ class VCard extends VObject\Document
         $writer->startElement(strtolower($this->name));
 
         foreach ($propertiesByGroup as $group => $properties) {
-            if (!empty($group)) {
+            if ('' !== $group) {
                 $writer->startElement('group');
-                $writer->writeAttribute('name', strtolower($group));
+                $writer->writeAttribute('name', strtolower((string) $group));
             }
 
             foreach ($properties as $property) {
@@ -487,7 +525,7 @@ class VCard extends VObject\Document
                 }
             }
 
-            if (!empty($group)) {
+            if ('' !== $group) {
                 $writer->endElement();
             }
         }
@@ -503,7 +541,7 @@ class VCard extends VObject\Document
         $className = parent::getClassNameForPropertyName($propertyName);
 
         // In vCard 4, BINARY no longer exists, and we need URI instead.
-        if (VObject\Property\Binary::class == $className && self::VCARD40 === $this->getDocumentType()) {
+        if (VObject\Property\Binary::class === $className && self::VCARD40 === $this->getDocumentType()) {
             return VObject\Property\Uri::class;
         }
 
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Component/VEvent.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Component/VEvent.php
index e29e56322..b1a762690 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Component/VEvent.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Component/VEvent.php
@@ -41,10 +41,10 @@ class VEvent extends VObject\Component
      */
     public function isInTimeRange(\DateTimeInterface $start, \DateTimeInterface $end): bool
     {
-        if ($this->RRULE) {
+        if ($this->RRULE || $this->RDATE) {
             try {
                 $it = new EventIterator($this, null, $start->getTimezone());
-            } catch (NoInstancesException $e) {
+            } catch (NoInstancesException) {
                 // If we've caught this exception, there are no instances
                 // for the event that fall into the specified time-range.
                 return false;
@@ -117,6 +117,7 @@ class VEvent extends VObject\Component
             'DTSTART' => $hasMethod ? '?' : '1',
             'CLASS' => '?',
             'CREATED' => '?',
+            'COLOR' => '?',
             'DESCRIPTION' => '?',
             'GEO' => '?',
             'LAST-MODIFIED' => '?',
@@ -137,7 +138,9 @@ class VEvent extends VObject\Component
             'ATTENDEE' => '*',
             'CATEGORIES' => '*',
             'COMMENT' => '*',
+            'CONFERENCE' => '*',
             'CONTACT' => '*',
+            'IMAGE' => '*',
             'EXDATE' => '*',
             'REQUEST-STATUS' => '*',
             'RELATED-TO' => '*',
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Component/VFreeBusy.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Component/VFreeBusy.php
index a9891c92c..623652ff9 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Component/VFreeBusy.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Component/VFreeBusy.php
@@ -41,7 +41,7 @@ class VFreeBusy extends VObject\Component
                 // Every period is formatted as [start]/[end]. The start is an
                 // absolute UTC time, the end may be an absolute UTC time, or
                 // duration (relative) value.
-                list($busyStart, $busyEnd) = explode('/', $period);
+                [$busyStart, $busyEnd] = explode('/', $period);
 
                 $busyStart = VObject\DateTimeParser::parse($busyStart);
                 $busyEnd = VObject\DateTimeParser::parse($busyEnd);
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Component/VJournal.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Component/VJournal.php
index 30e40adf7..79c14dece 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Component/VJournal.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Component/VJournal.php
@@ -62,6 +62,7 @@ class VJournal extends VObject\Component
 
             'CLASS' => '?',
             'CREATED' => '?',
+            'COLOR' => '?',
             'DTSTART' => '?',
             'LAST-MODIFIED' => '?',
             'ORGANIZER' => '?',
@@ -78,6 +79,7 @@ class VJournal extends VObject\Component
             'CATEGORIES' => '*',
             'COMMENT' => '*',
             'CONTACT' => '*',
+            'IMAGE' => '*',
             'DESCRIPTION' => '*',
             'EXDATE' => '*',
             'RELATED-TO' => '*',
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Component/VTodo.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Component/VTodo.php
index cab672ce5..e0ed15de0 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Component/VTodo.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Component/VTodo.php
@@ -54,9 +54,9 @@ class VTodo extends VObject\Component
                 return
                     ($start < $due || $start <= $dtstart)
                     && ($end > $dtstart || $end >= $due);
-            } else {
-                return $start <= $dtstart && $end > $dtstart;
             }
+
+            return $start <= $dtstart && $end > $dtstart;
         }
         if ($due) {
             return $start < $due && $end >= $due;
@@ -98,6 +98,7 @@ class VTodo extends VObject\Component
             'CLASS' => '?',
             'COMPLETED' => '?',
             'CREATED' => '?',
+            'COLOR' => '?',
             'DESCRIPTION' => '?',
             'DTSTART' => '?',
             'GEO' => '?',
@@ -120,7 +121,9 @@ class VTodo extends VObject\Component
             'ATTENDEE' => '*',
             'CATEGORIES' => '*',
             'COMMENT' => '*',
+            'CONFERENCE' => '*',
             'CONTACT' => '*',
+            'IMAGE' => '*',
             'EXDATE' => '*',
             'REQUEST-STATUS' => '*',
             'RELATED-TO' => '*',
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/DateTimeParser.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/DateTimeParser.php
index e8777b7fe..fad973a8c 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/DateTimeParser.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/DateTimeParser.php
@@ -42,7 +42,7 @@ class DateTimeParser
 
         try {
             $date = new \DateTimeImmutable($matches[1].'-'.$matches[2].'-'.$matches[3].' '.$matches[4].':'.$matches[5].':'.$matches[6], $tz);
-        } catch (\Exception $e) {
+        } catch (\Exception) {
             throw new InvalidDataException('The supplied iCalendar datetime value is incorrect: '.$dt);
         }
 
@@ -63,13 +63,11 @@ class DateTimeParser
             throw new InvalidDataException('The supplied iCalendar date value is incorrect: '.$date);
         }
 
-        if (is_null($tz)) {
-            $tz = new \DateTimeZone('UTC');
-        }
+        $tz ??= new \DateTimeZone('UTC');
 
         try {
             $date = new \DateTimeImmutable($matches[1].'-'.$matches[2].'-'.$matches[3], $tz);
-        } catch (\Exception $e) {
+        } catch (\Exception) {
             throw new InvalidDataException('The supplied iCalendar date value is incorrect: '.$date);
         }
 
@@ -205,9 +203,9 @@ class DateTimeParser
             return self::parseDuration($date);
         } elseif (8 === strlen($date)) {
             return self::parseDate($date, $referenceTz);
-        } else {
-            return self::parseDateTime($date, $referenceTz);
         }
+
+        return self::parseDateTime($date, $referenceTz);
     }
 
     /**
@@ -329,7 +327,7 @@ class DateTimeParser
 
         $result = [];
         foreach ($parts as $part) {
-            if (empty($matches[$part])) {
+            if (!array_key_exists($part, $matches) || '' === $matches[$part]) {
                 $result[$part] = null;
             } elseif ('-' === $matches[$part] || '--' === $matches[$part]) {
                 $result[$part] = null;
@@ -424,7 +422,7 @@ class DateTimeParser
 
         $result = [];
         foreach ($parts as $part) {
-            if (empty($matches[$part])) {
+            if (!array_key_exists($part, $matches) || '' === $matches[$part]) {
                 $result[$part] = null;
             } elseif ('-' === $matches[$part]) {
                 $result[$part] = null;
@@ -541,7 +539,7 @@ class DateTimeParser
         $parts['year0'] = &$parts['year'];
 
         foreach ($parts as $part => &$value) {
-            if (!empty($matches[$part])) {
+            if (array_key_exists($part, $matches) && '' !== $matches[$part]) {
                 $value = $matches[$part];
             }
         }
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Document.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Document.php
index 02eaf13c7..8319b49be 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Document.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Document.php
@@ -118,10 +118,10 @@ abstract class Document extends Component
     public function create(string $name)
     {
         if (isset(static::$componentMap[strtoupper($name)])) {
-            return call_user_func_array([$this, 'createComponent'], func_get_args());
-        } else {
-            return call_user_func_array([$this, 'createProperty'], func_get_args());
+            return $this->createComponent(...func_get_args());
         }
+
+        return $this->createProperty(...func_get_args());
     }
 
     /**
@@ -146,9 +146,7 @@ abstract class Document extends Component
         if (isset(static::$componentMap[$name])) {
             $class = static::$componentMap[$name];
         }
-        if (is_null($children)) {
-            $children = [];
-        }
+        $children ??= [];
 
         return new $class($this, $name, $children, $defaults);
     }
@@ -180,26 +178,29 @@ abstract class Document extends Component
 
         $class = null;
 
+        // If a VALUE parameter is supplied, we have to use that
+        // According to https://datatracker.ietf.org/doc/html/rfc5545#section-3.2.20
+        //  If the property's value is the default value type, then this
+        //  parameter need not be specified.  However, if the property's
+        //  default value type is overridden by some other allowable value
+        //  type, then this parameter MUST be specified.
+        if (!$valueType) {
+            $valueType = $parameters['VALUE'] ?? null;
+        }
+
         if ($valueType) {
             // The valueType argument comes first to figure out the correct
             // class.
             $class = $this->getClassNameForPropertyValue($valueType);
         }
 
-        if (is_null($class)) {
-            // If a VALUE parameter is supplied, we should use that.
-            if (isset($parameters['VALUE'])) {
-                $class = $this->getClassNameForPropertyValue($parameters['VALUE']);
-                if (is_null($class)) {
-                    throw new InvalidDataException('Unsupported VALUE parameter for '.$name.' property. You supplied "'.$parameters['VALUE'].'"');
-                }
-            } else {
-                $class = $this->getClassNameForPropertyName($name);
-            }
-        }
-        if (is_null($parameters)) {
-            $parameters = [];
-        }
+        // If the value parameter is not set or set to something we do not recognize
+        // we do not attempt to interpret or parse the datass value as specified in
+        // https://datatracker.ietf.org/doc/html/rfc5545#section-3.2.20
+        // So when we so far did not get a class-name, we use the default for the property
+        $class ??= $this->getClassNameForPropertyName($name);
+
+        $parameters ??= [];
 
         return new $class($this, $name, $value, $parameters, $group, $lineIndex, $lineString);
     }
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/FreeBusyData.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/FreeBusyData.php
index 405a5886d..6cdf2b937 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/FreeBusyData.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/FreeBusyData.php
@@ -11,25 +11,19 @@ namespace Sabre\VObject;
  */
 class FreeBusyData
 {
-    /**
-     * Start timestamp.
-     */
-    protected int $start;
-
-    /**
-     * End timestamp.
-     */
-    protected int $end;
-
     /**
      * A list of free-busy times.
      */
     protected array $data;
 
-    public function __construct(int $start, int $end)
+    public function __construct(/**
+     * Start timestamp.
+     */
+        protected int $start, /**
+     * End timestamp.
+     */
+        protected int $end)
     {
-        $this->start = $start;
-        $this->end = $end;
         $this->data = [];
 
         $this->data[] = [
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/FreeBusyGenerator.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/FreeBusyGenerator.php
index 424826034..9eec5c8d7 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/FreeBusyGenerator.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/FreeBusyGenerator.php
@@ -79,9 +79,7 @@ class FreeBusyGenerator
         if ($objects) {
             $this->setObjects($objects);
         }
-        if (is_null($timeZone)) {
-            $timeZone = new \DateTimeZone('UTC');
-        }
+        $timeZone ??= new \DateTimeZone('UTC');
         $this->setTimeZone($timeZone);
     }
 
@@ -217,7 +215,7 @@ class FreeBusyGenerator
         $new = [];
 
         foreach ($old as $vavail) {
-            list($compStart, $compEnd) = $vavail->getEffectiveStartEnd();
+            [$compStart, $compEnd] = $vavail->getEffectiveStartEnd();
 
             // We don't care about date-times that are earlier or later than the
             // start and end of the freebusy report, so this gets normalized
@@ -237,7 +235,7 @@ class FreeBusyGenerator
             // Going through our existing list of components to see if there's
             // a higher priority component that already fully covers this one.
             foreach ($new as $higherVavail) {
-                list($higherStart, $higherEnd) = $higherVavail->getEffectiveStartEnd();
+                [$higherStart, $higherEnd] = $higherVavail->getEffectiveStartEnd();
                 if (
                     (is_null($higherStart) || $higherStart < $compStart)
                     && (is_null($higherEnd) || $higherEnd > $compEnd)
@@ -259,7 +257,7 @@ class FreeBusyGenerator
         // priority components to override the lower ones.
         foreach (array_reverse($new) as $vavail) {
             $busyType = isset($vavail->BUSYTYPE) ? strtoupper($vavail->BUSYTYPE) : 'BUSY-UNAVAILABLE';
-            list($vavailStart, $vavailEnd) = $vavail->getEffectiveStartEnd();
+            [$vavailStart, $vavailEnd] = $vavail->getEffectiveStartEnd();
 
             // Making the component size no larger than the requested free-busy
             // report range.
@@ -281,7 +279,7 @@ class FreeBusyGenerator
             // Looping over the AVAILABLE components.
             if (isset($vavail->AVAILABLE)) {
                 foreach ($vavail->AVAILABLE as $available) {
-                    list($availStart, $availEnd) = $available->getEffectiveStartEnd();
+                    [$availStart, $availEnd] = $available->getEffectiveStartEnd();
                     $fbData->add(
                         $availStart->getTimeStamp(),
                         $availEnd->getTimeStamp(),
@@ -362,7 +360,7 @@ class FreeBusyGenerator
                         if ($component->RRULE) {
                             try {
                                 $iterator = new EventIterator($object, (string) $component->UID, $this->timeZone);
-                            } catch (NoInstancesException $e) {
+                            } catch (NoInstancesException) {
                                 // This event is recurring, but it doesn't have a single
                                 // instance. We are skipping this event from the output
                                 // entirely.
@@ -437,12 +435,12 @@ class FreeBusyGenerator
                                 continue;
                             }
 
-                            $values = explode(',', $freebusy);
+                            $values = explode(',', (string) $freebusy);
                             foreach ($values as $value) {
-                                list($startTime, $endTime) = explode('/', $value);
+                                [$startTime, $endTime] = explode('/', $value);
                                 $startTime = DateTimeParser::parseDateTime($startTime);
 
-                                if ('P' === substr($endTime, 0, 1) || '-P' === substr($endTime, 0, 2)) {
+                                if (str_starts_with($endTime, 'P') || str_starts_with($endTime, '-P')) {
                                     $duration = DateTimeParser::parseDuration($endTime);
                                     $endTime = clone $startTime;
                                     $endTime = $endTime->add($duration);
@@ -507,7 +505,7 @@ class FreeBusyGenerator
         $vfreebusy->add($dtstamp);
 
         foreach ($fbData->getData() as $busyTime) {
-            $busyType = strtoupper($busyTime['type']);
+            $busyType = strtoupper((string) $busyTime['type']);
 
             // Ignoring all the FREE parts, because those are already assumed.
             if ('FREE' === $busyType) {
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/ITip/Broker.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/ITip/Broker.php
index 76ee0c71e..19de8b16b 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/ITip/Broker.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/ITip/Broker.php
@@ -228,7 +228,7 @@ class Broker
 
             $eventInfo = $oldEventInfo;
 
-            if (in_array($eventInfo['organizer'], $userHref)) {
+            if (in_array($eventInfo['organizer'], $userHref, true)) {
                 // This is an organizer deleting the event.
                 $eventInfo['attendees'] = [];
                 // Increasing the sequence, but only if the organizer deleted
@@ -237,7 +237,7 @@ class Broker
             } else {
                 // This is an attendee deleting the event.
                 foreach ($eventInfo['attendees'] as $key => $attendee) {
-                    if (in_array($attendee['href'], $userHref)) {
+                    if (in_array($attendee['href'], $userHref, true)) {
                         $eventInfo['attendees'][$key]['instances'] = ['master' => ['id' => 'master', 'partstat' => 'DECLINED'],
                         ];
                     }
@@ -246,16 +246,29 @@ class Broker
             $baseCalendar = $oldCalendar;
         }
 
-        if (in_array($eventInfo['organizer'], $userHref)) {
+        // Check if the user is the organizer
+        if (in_array($eventInfo['organizer'], $userHref, true)) {
             return $this->parseEventForOrganizer($baseCalendar, $eventInfo, $oldEventInfo);
-        } elseif ($oldCalendar) {
-            // We need to figure out if the user is an attendee, but we're only
-            // doing so if there's an oldCalendar, because we only want to
-            // process updates, not creation of new events.
-            foreach ($eventInfo['attendees'] as $attendee) {
-                if (in_array($attendee['href'], $userHref)) {
+        }
+
+        // Check if the user is an attendee
+        foreach ($eventInfo['attendees'] as $attendee) {
+            if (in_array($attendee['href'], $userHref, true)) {
+                // If this is a event update, we always generate a reply
+                if ($oldCalendar) {
                     return $this->parseEventForAttendee($baseCalendar, $eventInfo, $oldEventInfo, $attendee['href']);
                 }
+
+                // If this is a new event, we only generate a reply if the participation status is set
+                foreach ($attendee['instances'] as $instance) {
+                    if (isset($instance['partstat']) && 'NEEDS-ACTION' !== $instance['partstat']) {
+                        // Attendee has responded (ACCEPTED/DECLINED/TENTATIVE) - generate REPLY
+                        return $this->parseEventForAttendee($baseCalendar, $eventInfo, $oldEventInfo, $attendee['href']);
+                    }
+                }
+
+                // User is attendee but no response to process
+                break;
             }
         }
 
@@ -341,7 +354,7 @@ class Broker
             $instances[$recurId] = $attendee['PARTSTAT']->getValue();
             if (isset($vevent->{'REQUEST-STATUS'})) {
                 $requestStatus = $vevent->{'REQUEST-STATUS'}->getValue();
-                list($requestStatus) = explode(';', $requestStatus);
+                [$requestStatus] = explode(';', $requestStatus);
             }
         }
 
@@ -479,7 +492,6 @@ class Broker
         }
 
         $messages = [];
-
         foreach ($attendees as $attendee) {
             // An organizer can also be an attendee. We should not generate any
             // messages for those.
@@ -554,7 +566,7 @@ class Broker
 
                 $message->significantChange =
                     'REQUEST' === $attendee['forceSend']
-                    || count($oldAttendeeInstances) != count($newAttendeeInstances)
+                    || count($oldAttendeeInstances) !== count($newAttendeeInstances)
                     || count(array_diff($oldAttendeeInstances, $newAttendeeInstances)) > 0
                     || $oldEventInfo['significantChangeHash'] !== $eventInfo['significantChangeHash'];
 
@@ -564,9 +576,9 @@ class Broker
                         // We need to find a list of events that the attendee
                         // is not a part of to add to the list of exceptions.
                         $exceptions = [];
-                        foreach ($eventInfo['instances'] as $instanceId => $vevent) {
-                            if (!isset($attendee['newInstances'][$instanceId])) {
-                                $exceptions[] = $instanceId;
+                        foreach ($eventInfo['instances'] as $eventInstanceId => $vevent) {
+                            if (!isset($attendee['newInstances'][$eventInstanceId])) {
+                                $exceptions[] = $eventInstanceId;
                             }
                         }
 
@@ -580,6 +592,9 @@ class Broker
                                 ));
                             } else {
                                 $currentEvent->EXDATE = $exceptions;
+                                if ($currentEvent->DTSTART['TZID']) {
+                                    $currentEvent->EXDATE['TZID'] = clone $currentEvent->DTSTART['TZID'];
+                                }
                             }
                         }
 
@@ -588,15 +603,13 @@ class Broker
                         unset($currentEvent->ORGANIZER['SCHEDULE-FORCE-SEND']);
                         unset($currentEvent->ORGANIZER['SCHEDULE-STATUS']);
 
-                        foreach ($currentEvent->ATTENDEE as $attendee) {
-                            unset($attendee['SCHEDULE-FORCE-SEND']);
-                            unset($attendee['SCHEDULE-STATUS']);
+                        foreach ($currentEvent->ATTENDEE as $currentEventAttendee) {
+                            unset($currentEventAttendee['SCHEDULE-FORCE-SEND']);
+                            unset($currentEventAttendee['SCHEDULE-STATUS']);
 
                             // We're adding PARTSTAT=NEEDS-ACTION to ensure that
                             // iOS shows an "Inbox Item"
-                            if (!isset($attendee['PARTSTAT'])) {
-                                $attendee['PARTSTAT'] = 'NEEDS-ACTION';
-                            }
+                            $currentEventAttendee['PARTSTAT'] ??= 'NEEDS-ACTION';
                         }
                     }
 
@@ -633,7 +646,12 @@ class Broker
             return [];
         }
 
-        $oldInstances = !empty($oldEventInfo['attendees'][$attendee]['instances']) ?
+        $oldInstances =
+            is_array($oldEventInfo['attendees'])
+            && array_key_exists($attendee, $oldEventInfo['attendees'])
+            && is_array($oldEventInfo['attendees'][$attendee])
+            && array_key_exists('instances', $oldEventInfo['attendees'][$attendee])
+            && is_array($oldEventInfo['attendees'][$attendee]['instances']) ?
             $oldEventInfo['attendees'][$attendee]['instances'] :
             [];
 
@@ -664,7 +682,7 @@ class Broker
         // We only need to do that though, if the master event is not declined.
         if (isset($instances['master']) && 'DECLINED' !== $instances['master']['newstatus']) {
             foreach ($eventInfo['exdate'] as $exDate) {
-                if (!in_array($exDate, $oldEventInfo['exdate'])) {
+                if (!in_array($exDate, $oldEventInfo['exdate'] ?? [], true)) {
                     if (isset($instances[$exDate])) {
                         $instances[$exDate]['newstatus'] = 'DECLINED';
                     } else {
@@ -707,7 +725,7 @@ class Broker
         $hasReply = false;
 
         foreach ($instances as $instance) {
-            if ($instance['oldstatus'] == $instance['newstatus'] && 'REPLY' !== $eventInfo['organizerForceSend']) {
+            if ($instance['oldstatus'] === $instance['newstatus'] && 'REPLY' !== $eventInfo['organizerForceSend']) {
                 // Skip
                 continue;
             }
@@ -739,7 +757,7 @@ class Broker
                 // EXDATE
                 $dt = DateTimeParser::parse($instance['id'], $eventInfo['timezone']);
                 // Treat is as a DATE field
-                if (strlen($instance['id']) <= 8) {
+                if (strlen((string) $instance['id']) <= 8) {
                     $event->add('DTSTART', $dt, ['VALUE' => 'DATE']);
                 } else {
                     $event->add('DTSTART', $dt);
@@ -751,7 +769,7 @@ class Broker
             if ('master' !== $instance['id']) {
                 $dt = DateTimeParser::parse($instance['id'], $eventInfo['timezone']);
                 // Treat is as a DATE field
-                if (strlen($instance['id']) <= 8) {
+                if (strlen((string) $instance['id']) <= 8) {
                     $event->add('RECURRENCE-ID', $dt, ['VALUE' => 'DATE']);
                 } else {
                     $event->add('RECURRENCE-ID', $dt);
@@ -774,9 +792,9 @@ class Broker
             $message->message = $icalMsg;
 
             return [$message];
-        } else {
-            return [];
         }
+
+        return [];
     }
 
     /**
@@ -843,7 +861,7 @@ class Broker
                     $organizer = $vevent->ORGANIZER->getNormalizedValue();
                     $organizerName = $vevent->ORGANIZER['CN'] ?? null;
                 } else {
-                    if (strtoupper($organizer) !== strtoupper($vevent->ORGANIZER->getNormalizedValue())) {
+                    if (strtoupper($organizer) !== strtoupper((string) $vevent->ORGANIZER->getNormalizedValue())) {
                         throw new SameOrganizerForAllComponentsException('Every instance of the event must have the same organizer.');
                     }
                 }
@@ -869,7 +887,7 @@ class Broker
                 foreach ($vevent->select('RRULE') as $rr) {
                     foreach ($rr->getParts() as $key => $val) {
                         // ignore default values (https://github.com/sabre-io/vobject/issues/126)
-                        if ('INTERVAL' === $key && 1 == $val) {
+                        if ('INTERVAL' === $key && '1' === (string) $val) {
                             continue;
                         }
                         if (is_array($val)) {
@@ -881,7 +899,7 @@ class Broker
                 sort($rrule);
             }
             if (isset($vevent->STATUS)) {
-                $status = strtoupper($vevent->STATUS->getValue());
+                $status = strtoupper((string) $vevent->STATUS->getValue());
             }
 
             $recurId = isset($vevent->{'RECURRENCE-ID'}) ? $vevent->{'RECURRENCE-ID'}->getValue() : 'master';
@@ -892,11 +910,14 @@ class Broker
                     $timezone = $vevent->{'RECURRENCE-ID'}->getDateTime()->getTimeZone();
                 }
             }
+
+            $instances[$recurId] = $vevent;
+
             if (isset($vevent->ATTENDEE)) {
                 foreach ($vevent->ATTENDEE as $attendee) {
                     if ($this->scheduleAgentServerRules
                         && isset($attendee['SCHEDULE-AGENT'])
-                        && 'CLIENT' === strtoupper($attendee['SCHEDULE-AGENT']->getValue())
+                        && 'CLIENT' === strtoupper((string) $attendee['SCHEDULE-AGENT']->getValue())
                     ) {
                         continue;
                     }
@@ -930,10 +951,10 @@ class Broker
                         ];
                     }
                 }
-                $instances[$recurId] = $vevent;
             }
 
             foreach ($this->significantChangeProperties as $prop) {
+                // @phpstan-ignore property.dynamicName
                 if (isset($vevent->$prop)) {
                     $propertyValues = $vevent->select($prop);
 
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/ITip/Message.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/ITip/Message.php
index 9aa93996a..505e07f25 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/ITip/Message.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/ITip/Message.php
@@ -32,12 +32,12 @@ class Message
      * Contains the ITip method, which is something like REQUEST, REPLY or
      * CANCEL.
      */
-    public ?string $method;
+    public ?string $method = null;
 
     /**
      * The current sequence number for the event.
      */
-    public ?int $sequence;
+    public ?int $sequence = null;
 
     /**
      * The senders' email address.
@@ -52,7 +52,7 @@ class Message
      * The name of the sender. This is often populated from a CN parameter from
      * either the ORGANIZER or ATTENDEE, depending on the message.
      */
-    public ?string $senderName;
+    public ?string $senderName = null;
 
     /**
      * The recipient's email address.
@@ -63,7 +63,7 @@ class Message
      * The name of the recipient. This is usually populated with the CN
      * parameter from the ATTENDEE or ORGANIZER property, if it's available.
      */
-    public ?string $recipientName;
+    public ?string $recipientName = null;
 
     /**
      * After the message has been delivered, this should contain a string such
@@ -107,10 +107,9 @@ class Message
     {
         if (!$this->scheduleStatus) {
             return false;
-        } else {
-            list($scheduleStatus) = explode(';', $this->scheduleStatus);
-
-            return $scheduleStatus;
         }
+        [$scheduleStatus] = explode(';', $this->scheduleStatus);
+
+        return $scheduleStatus;
     }
 }
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Node.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Node.php
index 0dbe7cfad..47889a2ab 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Node.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Node.php
@@ -42,7 +42,7 @@ abstract class Node implements \IteratorAggregate, \ArrayAccess, \Countable, \Js
     /**
      * Reference to the parent object, if this is not the top object.
      */
-    public ?Node $parent;
+    public ?Node $parent = null;
 
     /**
      * Iterator override.
@@ -52,7 +52,7 @@ abstract class Node implements \IteratorAggregate, \ArrayAccess, \Countable, \Js
     /**
      * The root document.
      */
-    protected ?Component $root;
+    protected ?Component $root = null;
 
     /**
      * Serializes the node into a mimedir format.
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/PHPUnitAssertions.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/PHPUnitAssertions.php
index 1976c3afd..aad5438a5 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/PHPUnitAssertions.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/PHPUnitAssertions.php
@@ -41,7 +41,7 @@ trait PHPUnitAssertions
                 $input = Reader::read($input);
             }
             if (!$input instanceof Component) {
-                $this->fail('Input must be a string, stream or VObject component');
+                self::fail('Input must be a string, stream or VObject component');
             }
             unset($input->PRODID);
             if ($input instanceof Component\VCalendar && 'GREGORIAN' === (string) $input->CALSCALE) {
@@ -51,23 +51,28 @@ trait PHPUnitAssertions
             return $input;
         };
 
-        $expected = $getObj($expected)->serialize();
-        $actual = $getObj($actual)->serialize();
+        /**
+         * @var string $expectedSerialized
+         */
+        $expectedSerialized = $getObj($expected)->serialize();
+        $actualSerialized = $getObj($actual)->serialize();
 
         // Finding wildcards in expected.
-        preg_match_all('|^([A-Z]+):\\*\\*ANY\\*\\*\r$|m', $expected, $matches, PREG_SET_ORDER);
+        $result = preg_match_all('|^([A-Z]+):\\*\\*ANY\\*\\*\r$|m', $expectedSerialized, $matches, PREG_SET_ORDER);
+
+        self::assertNotFalse($result);
 
         foreach ($matches as $match) {
-            $actual = preg_replace(
+            $actualSerialized = preg_replace(
                 '|^'.preg_quote($match[1], '|').':(.*)\r$|m',
                 $match[1].':**ANY**'."\r",
-                $actual
+                (string) $actualSerialized
             );
         }
 
-        $this->assertEquals(
-            $expected,
-            $actual,
+        self::assertEquals(
+            $expectedSerialized,
+            $actualSerialized,
             $message
         );
     }
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Parameter.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Parameter.php
index c5217f1dc..c97e76ea9 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Parameter.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Parameter.php
@@ -16,7 +16,7 @@ use Sabre\Xml;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Parameter extends Node
+class Parameter extends Node implements \Stringable
 {
     /**
      * Parameter name.
@@ -74,83 +74,12 @@ class Parameter extends Node
      */
     public static function guessParameterNameByValue(string $value): string
     {
-        switch (strtoupper($value)) {
-            // Encodings
-            case '7-BIT':
-            case 'QUOTED-PRINTABLE':
-            case 'BASE64':
-                $name = 'ENCODING';
-                break;
-
-                // Common types
-            case 'WORK':
-            case 'HOME':
-            case 'PREF':
-                // Delivery Label Type
-            case 'DOM':
-            case 'INTL':
-            case 'POSTAL':
-            case 'PARCEL':
-                // Telephone types
-            case 'VOICE':
-            case 'FAX':
-            case 'MSG':
-            case 'CELL':
-            case 'PAGER':
-            case 'BBS':
-            case 'MODEM':
-            case 'CAR':
-            case 'ISDN':
-            case 'VIDEO':
-                // EMAIL types (lol)
-            case 'AOL':
-            case 'APPLELINK':
-            case 'ATTMAIL':
-            case 'CIS':
-            case 'EWORLD':
-            case 'INTERNET':
-            case 'IBMMAIL':
-            case 'MCIMAIL':
-            case 'POWERSHARE':
-            case 'PRODIGY':
-            case 'TLX':
-            case 'X400':
-                // Photo / Logo format types
-            case 'GIF':
-            case 'CGM':
-            case 'WMF':
-            case 'BMP':
-            case 'DIB':
-            case 'PICT':
-            case 'TIFF':
-            case 'PDF':
-            case 'PS':
-            case 'JPEG':
-            case 'MPEG':
-            case 'MPEG2':
-            case 'AVI':
-            case 'QTIME':
-                // Sound Digital Audio Type
-            case 'WAVE':
-            case 'PCM':
-            case 'AIFF':
-                // Key types
-            case 'X509':
-            case 'PGP':
-                $name = 'TYPE';
-                break;
-
-                // Value types
-            case 'INLINE':
-            case 'URL':
-            case 'CONTENT-ID':
-            case 'CID':
-                $name = 'VALUE';
-                break;
-
-            default:
-                $name = '';
-        }
+        $name = match (strtoupper($value)) {
+            '7-BIT', 'QUOTED-PRINTABLE', 'BASE64' => 'ENCODING',
+            'WORK', 'HOME', 'PREF', 'DOM', 'INTL', 'POSTAL', 'PARCEL', 'VOICE', 'FAX', 'MSG', 'CELL', 'PAGER', 'BBS', 'MODEM', 'CAR', 'ISDN', 'VIDEO', 'AOL', 'APPLELINK', 'ATTMAIL', 'CIS', 'EWORLD', 'INTERNET', 'IBMMAIL', 'MCIMAIL', 'POWERSHARE', 'PRODIGY', 'TLX', 'X400', 'GIF', 'CGM', 'WMF', 'BMP', 'DIB', 'PICT', 'TIFF', 'PDF', 'PS', 'JPEG', 'MPEG', 'MPEG2', 'AVI', 'QTIME', 'WAVE', 'PCM', 'AIFF', 'X509', 'PGP' => 'TYPE',
+            'INLINE', 'URL', 'CONTENT-ID', 'CID' => 'VALUE',
+            default => '',
+        };
 
         return $name;
     }
@@ -177,9 +106,9 @@ class Parameter extends Node
     {
         if (is_array($this->value)) {
             return implode(',', $this->value);
-        } else {
-            return $this->value;
         }
+
+        return $this->value;
     }
 
     /**
@@ -201,9 +130,9 @@ class Parameter extends Node
             return $this->value;
         } elseif (is_null($this->value)) {
             return [];
-        } else {
-            return [$this->value];
         }
+
+        return [$this->value];
     }
 
     /**
@@ -234,7 +163,8 @@ class Parameter extends Node
     {
         return in_array(
             strtolower($value),
-            array_map('strtolower', (array) $this->value)
+            array_map(strtolower(...), (array) $this->value),
+            true
         );
     }
 
@@ -278,20 +208,19 @@ class Parameter extends Node
                 // added + as well.
                 if (!preg_match('#(?: [\n":;\^,\+] )#x', $item)) {
                     return $out.$item;
-                } else {
-                    // Enclosing in double-quotes, and using RFC6868 for encoding any
-                    // special characters
-                    $out .= '"'.strtr(
-                        $item,
-                        [
-                            '^' => '^^',
-                            "\n" => '^n',
-                            '"' => '^\'',
-                        ]
-                    ).'"';
-
-                    return $out;
                 }
+                // Enclosing in double-quotes, and using RFC6868 for encoding any
+                // special characters
+                $out .= '"'.strtr(
+                    $item,
+                    [
+                        '^' => '^^',
+                        "\n" => '^n',
+                        '"' => '^\'',
+                    ]
+                ).'"';
+
+                return $out;
             }
         );
     }
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Parser/Json.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Parser/Json.php
index 9729afe86..e54a61c7e 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Parser/Json.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Parser/Json.php
@@ -27,12 +27,12 @@ class Json extends Parser
     /**
      * The input data.
      */
-    protected ?array $input;
+    protected ?array $input = null;
 
     /**
      * Root component.
      */
-    protected ?Document $root;
+    protected ?Document $root = null;
 
     /**
      * This method starts the parsing process.
@@ -61,16 +61,11 @@ class Json extends Parser
             $this->options = $options;
         }
 
-        switch ($this->input[0]) {
-            case 'vcalendar':
-                $this->root = new VCalendar([], false);
-                break;
-            case 'vcard':
-                $this->root = new VCard([], false);
-                break;
-            default:
-                throw new ParseException('The root component must either be a vcalendar, or a vcard');
-        }
+        $this->root = match ($this->input[0]) {
+            'vcalendar' => new VCalendar([], false),
+            'vcard' => new VCard([], false),
+            default => throw new ParseException('The root component must either be a vcalendar, or a vcard'),
+        };
         foreach ($this->input[1] as $prop) {
             $this->root->add($this->parseProperty($prop));
         }
@@ -97,17 +92,13 @@ class Json extends Parser
         $self = $this;
 
         $properties = array_map(
-            function ($jProp) use ($self) {
-                return $self->parseProperty($jProp);
-            },
+            $self->parseProperty(...),
             $jComp[1]
         );
 
         if (isset($jComp[2])) {
             $components = array_map(
-                function ($jComp) use ($self) {
-                    return $self->parseComponent($jComp);
-                },
+                $self->parseComponent(...),
                 $jComp[2]
             );
         } else {
@@ -134,7 +125,7 @@ class Json extends Parser
             $valueType,
         ) = $jProp;
 
-        $propertyName = strtoupper($propertyName);
+        $propertyName = strtoupper((string) $propertyName);
 
         // This is the default class we would be using if we didn't know the
         // value type. We're using this value later in this function.
@@ -144,7 +135,7 @@ class Json extends Parser
 
         $value = array_slice($jProp, 3);
 
-        $valueType = strtoupper($valueType);
+        $valueType = strtoupper((string) $valueType);
 
         if (isset($parameters['group'])) {
             $propertyName = $parameters['group'].'.'.$propertyName;
@@ -169,7 +160,7 @@ class Json extends Parser
         // If the value type we received (e.g.: TEXT) was not the default value
         // type for the given property (e.g.: BDAY), we need to add a VALUE=
         // parameter.
-        if ($defaultPropertyClass !== get_class($prop)) {
+        if ($defaultPropertyClass !== $prop::class) {
             $prop['VALUE'] = $valueType;
         }
 
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Parser/MimeDir.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Parser/MimeDir.php
index be5d87baf..1263ced8e 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Parser/MimeDir.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Parser/MimeDir.php
@@ -26,6 +26,11 @@ use Sabre\VObject\Property;
  */
 class MimeDir extends Parser
 {
+    public const TOKEN_PROPNAME = 1;
+    public const TOKEN_PROPVALUE = 2;
+    public const TOKEN_PARAMNAME = 3;
+    public const TOKEN_PARAMVALUE = 4;
+
     /**
      * The input stream.
      *
@@ -36,7 +41,7 @@ class MimeDir extends Parser
     /**
      * Root component.
      */
-    protected ?Document $root;
+    protected ?Document $root = null;
 
     /**
      * By default, all input will be assumed to be UTF-8.
@@ -106,7 +111,7 @@ class MimeDir extends Parser
      */
     public function setCharset(string $charset): void
     {
-        if (!in_array($charset, self::$SUPPORTED_CHARSETS)) {
+        if (!in_array($charset, self::$SUPPORTED_CHARSETS, true)) {
             throw new \InvalidArgumentException('Unsupported encoding. (Supported encodings: '.implode(', ', self::$SUPPORTED_CHARSETS).')');
         }
         $this->charset = $charset;
@@ -150,23 +155,18 @@ class MimeDir extends Parser
 
         // BOM is ZERO WIDTH NO-BREAK SPACE (U+FEFF).
         // It's 0xEF 0xBB 0xBF in UTF-8 hex.
-        if (3 <= strlen($line)
+        if (3 <= strlen((string) $line)
             && 0xEF === ord($line[0])
             && 0xBB === ord($line[1])
             && 0xBF === ord($line[2])) {
-            $line = \substr($line, 3);
+            $line = \substr((string) $line, 3);
         }
 
-        switch (strtoupper($line)) {
-            case 'BEGIN:VCALENDAR':
-                $class = VCalendar::$componentMap['VCALENDAR'];
-                break;
-            case 'BEGIN:VCARD':
-                $class = VCard::$componentMap['VCARD'];
-                break;
-            default:
-                throw new ParseException('This parser only supports VCARD and VCALENDAR files');
-        }
+        $class = match (strtoupper((string) $line)) {
+            'BEGIN:VCALENDAR' => VCalendar::$componentMap['VCALENDAR'],
+            'BEGIN:VCARD' => VCard::$componentMap['VCARD'],
+            default => throw new ParseException('This parser only supports VCARD and VCALENDAR files'),
+        };
 
         $this->root = new $class([], false);
 
@@ -174,10 +174,10 @@ class MimeDir extends Parser
             // Reading until we hit END:
             try {
                 $line = $this->readLine();
-            } catch (EofException $oEx) {
+            } catch (EofException) {
                 $line = 'END:'.$this->root->name;
             }
-            if ('END:' === strtoupper(\substr($line, 0, 4))) {
+            if ('END:' === strtoupper(\substr((string) $line, 0, 4))) {
                 break;
             }
             $result = $this->parseLine($line);
@@ -186,7 +186,7 @@ class MimeDir extends Parser
             }
         }
 
-        $name = strtoupper(\substr($line, 4));
+        $name = strtoupper(\substr((string) $line, 4));
         if ($name !== $this->root->name) {
             throw new ParseException('Invalid MimeDir file. expected: "END:'.$this->root->name.'" got: "END:'.$name.'"');
         }
@@ -215,7 +215,7 @@ class MimeDir extends Parser
             while (true) {
                 // Reading until we hit END:
                 $line = $this->readLine();
-                if ('END:' === strtoupper(\substr($line, 0, 4))) {
+                if ('END:' === strtoupper(\substr((string) $line, 0, 4))) {
                     break;
                 }
                 $result = $this->parseLine($line);
@@ -224,22 +224,21 @@ class MimeDir extends Parser
                 }
             }
 
-            $name = strtoupper(\substr($line, 4));
+            $name = strtoupper(\substr((string) $line, 4));
             if ($name !== $component->name) {
                 throw new ParseException('Invalid MimeDir file. expected: "END:'.$component->name.'" got: "END:'.$name.'"');
             }
 
             return $component;
-        } else {
-            // Property reader
-            $property = $this->readProperty($line);
-            if (!$property) {
-                // Ignored line
-                return false;
-            }
-
-            return $property;
         }
+        // Property reader
+        $property = $this->readProperty($line);
+        if (!$property) {
+            // Ignored line
+            return false;
+        }
+
+        return $property;
     }
 
     /**
@@ -360,6 +359,12 @@ class MimeDir extends Parser
             'value' => null,
         ];
 
+        /*
+         * Keep track on the last token we parsed in order to do
+         * better error checking
+         */
+        $lastToken = null;
+
         $lastParam = null;
 
         /*
@@ -385,10 +390,16 @@ class MimeDir extends Parser
                         // option is set to ignore invalid lines, we ignore this line
                         // This can happen when servers provide faulty data as iCloud
                         //  frequently does with X-APPLE-STRUCTURED-LOCATION
+                        $lastToken = self::TOKEN_PARAMVALUE;
                         continue;
                     }
                     throw new ParseException('Invalid Mimedir file. Line starting at '.$this->startLine.' did not follow iCalendar/vCard conventions');
                 }
+
+                if ('=' === $match[0][0] && self::TOKEN_PARAMNAME !== $lastToken) {
+                    throw new ParseException('Invalid Mimedir file. Line starting at '.$this->startLine.': Missing parameter name for parameter value "'.$match['paramValue'].'"');
+                }
+
                 if (\is_null($property['parameters'][$lastParam])) {
                     $property['parameters'][$lastParam] = $value;
                 } elseif (is_array($property['parameters'][$lastParam])) {
@@ -402,21 +413,23 @@ class MimeDir extends Parser
                         $value,
                     ];
                 }
+                $lastToken = self::TOKEN_PARAMVALUE;
                 continue;
             }
             if (isset($match['paramName'])) {
                 $lastParam = strtoupper($match['paramName']);
-                if (!isset($property['parameters'][$lastParam])) {
-                    $property['parameters'][$lastParam] = null;
-                }
+                $property['parameters'][$lastParam] ??= null;
+                $lastToken = self::TOKEN_PARAMNAME;
                 continue;
             }
             if (isset($match['propValue'])) {
                 $property['value'] = $match['propValue'];
+                $lastToken = self::TOKEN_PROPVALUE;
                 continue;
             }
-            if (isset($match['name']) && $match['name']) {
+            if (isset($match['name']) && 0 < strlen($match['name'])) {
                 $property['name'] = strtoupper($match['name']);
+                $lastToken = self::TOKEN_PROPNAME;
                 continue;
             }
 
@@ -425,10 +438,8 @@ class MimeDir extends Parser
             // @codeCoverageIgnoreEnd
         }
 
-        if (\is_null($property['value'])) {
-            $property['value'] = '';
-        }
-        if (!$property['name']) {
+        $property['value'] ??= '';
+        if (!isset($property['name']) || 0 === strlen($property['name'])) {
             if ($this->options & self::OPTION_IGNORE_INVALID_LINES) {
                 return false;
             }
@@ -671,7 +682,7 @@ class MimeDir extends Parser
         // missing a whitespace. So if 'forgiving' is turned on, we will take
         // those as well.
         if ($this->options & self::OPTION_FORGIVING) {
-            while ('=' === \substr($value, -1) && $this->lineBuffer) {
+            while (str_ends_with($value, '=') && $this->lineBuffer) {
                 // Reading the line
                 $this->readLine();
                 // Grabbing the raw form
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Parser/Parser.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Parser/Parser.php
index 29921d182..c5126445a 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Parser/Parser.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Parser/Parser.php
@@ -30,11 +30,6 @@ abstract class Parser
      */
     public const OPTION_IGNORE_INVALID_LINES = 2;
 
-    /**
-     * Bitmask of parser options.
-     */
-    protected int $options;
-
     /**
      * Creates the parser.
      *
@@ -42,12 +37,11 @@ abstract class Parser
      *
      * @param int $options any parser options (OPTION constants)
      */
-    public function __construct($input = null, int $options = 0)
+    public function __construct($input = null, protected int $options = 0)
     {
         if (!is_null($input)) {
             $this->setInput($input);
         }
-        $this->options = $options;
     }
 
     /**
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Parser/XML.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Parser/XML.php
index 43e42e6d5..46abd8020 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Parser/XML.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Parser/XML.php
@@ -28,17 +28,17 @@ class XML extends Parser
     /**
      * The input data.
      */
-    protected ?array $input;
+    protected ?array $input = null;
 
     /**
      * A pointer/reference to the input.
      */
-    private ?array $pointer;
+    private ?array $pointer = null;
 
     /**
      * Document, root component.
      */
-    protected ?Document $root;
+    protected ?Document $root = null;
 
     /**
      * Creates the parser.
@@ -112,7 +112,7 @@ class XML extends Parser
      */
     protected function parseVCalendarComponents(Component $parentComponent): void
     {
-        foreach ($this->pointer['value'] ?: [] as $children) {
+        foreach ($this->pointer['value'] ?? [] as $children) {
             switch (static::getTagName($children['name'])) {
                 case 'properties':
                     $this->pointer = &$children['value'];
@@ -145,8 +145,8 @@ class XML extends Parser
      */
     protected function parseProperties(Component $parentComponent, string $propertyNamePrefix = ''): void
     {
-        foreach ($this->pointer ?: [] as $xmlProperty) {
-            list($namespace, $tagName) = SabreXml\Service::parseClarkNotation($xmlProperty['name']);
+        foreach ($this->pointer ?? [] as $xmlProperty) {
+            [$namespace, $tagName] = SabreXml\Service::parseClarkNotation($xmlProperty['name']);
 
             $propertyName = $tagName;
             $propertyValue = [];
@@ -322,7 +322,7 @@ class XML extends Parser
      */
     protected function parseComponent(Component $parentComponent): void
     {
-        $components = $this->pointer['value'] ?: [];
+        $components = $this->pointer['value'] ?? [];
 
         foreach ($components as $component) {
             $componentName = static::getTagName($component['name']);
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property.php
index f4d0bdc0b..7432e5064 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property.php
@@ -14,27 +14,8 @@ use Sabre\Xml;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-abstract class Property extends Node
+abstract class Property extends Node implements \Stringable
 {
-    /**
-     * The root document.
-     */
-    public ?Component $root;
-
-    /**
-     * Property name.
-     *
-     * This will contain a string such as DTSTART, SUMMARY, FN.
-     */
-    public ?string $name;
-
-    /**
-     * Property group.
-     *
-     * This is only used in vcards
-     */
-    public ?string $group;
-
     /**
      * List of parameters.
      */
@@ -75,13 +56,13 @@ abstract class Property extends Node
      * @param array             $parameters List of parameters
      * @param string|null       $group      The vcard property group
      */
-    public function __construct(Component $root, ?string $name, $value = null, array $parameters = [], ?string $group = null, ?int $lineIndex = null, ?string $lineString = null)
+    public function __construct(public ?Component $root, /**
+     * Property name.
+     *
+     * This will contain a string such as DTSTART, SUMMARY, FN.
+     */
+        public ?string $name, $value = null, array $parameters = [], public ?string $group = null, ?int $lineIndex = null, ?string $lineString = null)
     {
-        $this->name = $name;
-        $this->group = $group;
-
-        $this->root = $root;
-
         foreach ($parameters as $k => $v) {
             $this->add($k, $v);
         }
@@ -123,7 +104,7 @@ abstract class Property extends Node
     public function getValue()
     {
         if (is_array($this->value)) {
-            if (0 == count($this->value)) {
+            if (0 === count($this->value)) {
                 return null;
             } elseif (1 === count($this->value)) {
                 return $this->value[0];
@@ -155,9 +136,9 @@ abstract class Property extends Node
             return [];
         } elseif (is_array($this->value)) {
             return $this->value;
-        } else {
-            return [$this->value];
         }
+
+        return [$this->value];
     }
 
     /**
@@ -242,7 +223,7 @@ abstract class Property extends Node
         );
 
         // remove single space after last CRLF
-        return \substr($str, 0, -1);
+        return \substr((string) $str, 0, -1);
     }
 
     /**
@@ -282,7 +263,7 @@ abstract class Property extends Node
             if ('VALUE' === $parameter->name) {
                 continue;
             }
-            $parameters[strtolower($parameter->name)] = $parameter->jsonSerialize();
+            $parameters[strtolower((string) $parameter->name)] = $parameter->jsonSerialize();
         }
         // In jCard, we need to encode the property-group as a separate 'group'
         // parameter.
@@ -292,7 +273,7 @@ abstract class Property extends Node
 
         return array_merge(
             [
-                strtolower($this->name),
+                strtolower((string) $this->name),
                 (object) $parameters,
                 strtolower($this->getValueType()),
             ],
@@ -329,13 +310,13 @@ abstract class Property extends Node
             $parameters[] = $parameter;
         }
 
-        $writer->startElement(strtolower($this->name));
+        $writer->startElement(strtolower((string) $this->name));
 
-        if (!empty($parameters)) {
+        if ([] !== $parameters) {
             $writer->startElement('parameters');
 
             foreach ($parameters as $parameter) {
-                $writer->startElement(strtolower($parameter->name));
+                $writer->startElement(strtolower((string) $parameter->name));
                 $writer->write($parameter);
                 $writer->endElement();
             }
@@ -520,7 +501,7 @@ abstract class Property extends Node
         }
 
         // Checking if the property name does not contain any invalid bytes.
-        if (!preg_match('/^([A-Z0-9-]+)$/', $this->name)) {
+        if (!preg_match('/^([A-Z0-9-]+)$/', (string) $this->name)) {
             $warnings[] = [
                 'level' => $options & self::REPAIR ? 1 : 3,
                 'message' => 'The property name: '.$this->name.' contains invalid characters. Only A-Z, 0-9 and - are allowed',
@@ -572,7 +553,7 @@ abstract class Property extends Node
                         }
                         break;
                 }
-                if ($allowedEncoding && !in_array(strtoupper($encoding), $allowedEncoding)) {
+                if ($allowedEncoding && !in_array(strtoupper($encoding), $allowedEncoding, true)) {
                     $warnings[] = [
                         'level' => 3,
                         'message' => 'ENCODING='.strtoupper($encoding).' is not valid for this document type.',
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/Binary.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/Binary.php
index 25cda8d25..9d68f415e 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/Binary.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/Binary.php
@@ -54,7 +54,7 @@ class Binary extends Property
      */
     public function setRawMimeDirValue(string $val): void
     {
-        $this->value = base64_decode($val);
+        $this->value = base64_decode($val, true);
     }
 
     /**
@@ -62,7 +62,7 @@ class Binary extends Property
      */
     public function getRawMimeDirValue(): string
     {
-        return base64_encode($this->value);
+        return base64_encode((string) $this->value);
     }
 
     /**
@@ -83,7 +83,7 @@ class Binary extends Property
      */
     public function getJsonValue(): array
     {
-        return [base64_encode($this->getValue())];
+        return [base64_encode((string) $this->getValue())];
     }
 
     /**
@@ -93,7 +93,7 @@ class Binary extends Property
      */
     public function setJsonValue(array $value): void
     {
-        $value = array_map('base64_decode', $value);
+        $value = array_map(base64_decode(...), $value);
         parent::setJsonValue($value);
     }
 }
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/Boolean.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/Boolean.php
index cdc3408aa..f33fbafdc 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/Boolean.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/Boolean.php
@@ -56,9 +56,7 @@ class Boolean extends Property
     public function setXmlValue(array $value): void
     {
         $value = array_map(
-            function ($value) {
-                return 'true' === $value;
-            },
+            fn ($value) => 'true' === $value,
             $value
         );
         parent::setXmlValue($value);
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/FloatValue.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/FloatValue.php
index 7a36e0976..32b02a972 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/FloatValue.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/FloatValue.php
@@ -67,7 +67,7 @@ class FloatValue extends Property
      */
     public function getJsonValue(): array
     {
-        $val = array_map('floatval', $this->getParts());
+        $val = array_map(floatval(...), $this->getParts());
 
         // Special-casing the GEO property.
         //
@@ -86,7 +86,7 @@ class FloatValue extends Property
      */
     public function setXmlValue(array $value): void
     {
-        $value = array_map('floatval', $value);
+        $value = array_map(floatval(...), $value);
         parent::setXmlValue($value);
     }
 
@@ -101,7 +101,7 @@ class FloatValue extends Property
         // See:
         // http://tools.ietf.org/html/rfc6321#section-3.4.1.2
         if ('GEO' === $this->name) {
-            $value = array_map('floatval', $this->getParts());
+            $value = array_map(floatval(...), $this->getParts());
 
             $writer->writeElement('latitude', $value[0]);
             $writer->writeElement('longitude', $value[1]);
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/ICalendar/CalAddress.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/ICalendar/CalAddress.php
index 01969e87d..a2b13eee7 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/ICalendar/CalAddress.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/ICalendar/CalAddress.php
@@ -43,10 +43,10 @@ class CalAddress extends Text
     public function getNormalizedValue(): string
     {
         $input = $this->getValue();
-        if (!strpos($input, ':')) {
+        if (!strpos((string) $input, ':')) {
             return $input;
         }
-        list($schema, $everythingElse) = explode(':', $input, 2);
+        [$schema, $everythingElse] = explode(':', (string) $input, 2);
         $schema = strtolower($schema);
         if ('mailto' === $schema) {
             $everythingElse = strtolower($everythingElse);
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/ICalendar/DateTime.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/ICalendar/DateTime.php
index 631a73b08..cd92475f3 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/ICalendar/DateTime.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/ICalendar/DateTime.php
@@ -111,7 +111,7 @@ class DateTime extends Property
             !$this->hasTime()
             || (
                 !isset($this['TZID'])
-                && false === strpos($this->getValue(), 'Z')
+                && !str_contains((string) $this->getValue(), 'Z')
             );
     }
 
@@ -205,7 +205,7 @@ class DateTime extends Property
                 }
                 if (is_null($tz)) {
                     $tz = $d->getTimeZone();
-                    $isUtc = in_array($tz->getName(), ['UTC', 'GMT', 'Z', '+00:00']);
+                    $isUtc = in_array($tz->getName(), ['UTC', 'GMT', 'Z', '+00:00'], true);
                     if (!$isUtc) {
                         $this->offsetSet('TZID', $tz->getName());
                     }
@@ -257,15 +257,15 @@ class DateTime extends Property
         $isFloating = $this->isFloating();
 
         $tz = $dts[0]->getTimeZone();
-        $isUtc = !$isFloating && in_array($tz->getName(), ['UTC', 'GMT', 'Z']);
+        $isUtc = !$isFloating && in_array($tz->getName(), ['UTC', 'GMT', 'Z'], true);
 
         return array_map(
             function (\DateTimeInterface $dt) use ($hasTime, $isUtc) {
                 if ($hasTime) {
                     return $dt->format('Y-m-d\\TH:i:s').($isUtc ? 'Z' : '');
-                } else {
-                    return $dt->format('Y-m-d');
                 }
+
+                return $dt->format('Y-m-d');
             },
             $dts
         );
@@ -286,9 +286,7 @@ class DateTime extends Property
         // those.
         $this->setValue(
             array_map(
-                function ($item) {
-                    return strtr($item, [':' => '', '-' => '']);
-                },
+                fn ($item) => strtr($item, [':' => '', '-' => '']),
                 $value
             )
         );
@@ -306,7 +304,7 @@ class DateTime extends Property
     public function offsetSet($offset, $value): void
     {
         parent::offsetSet($offset, $value);
-        if ('VALUE' !== strtoupper($offset)) {
+        if ('VALUE' !== strtoupper((string) $offset)) {
             return;
         }
 
@@ -347,7 +345,7 @@ class DateTime extends Property
                         DateTimeParser::parseDateTime($value);
                         break;
                 }
-            } catch (InvalidDataException $e) {
+            } catch (InvalidDataException) {
                 $messages[] = [
                     'level' => 3,
                     'message' => 'The supplied value ('.$value.') is not a correct '.$valueType,
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/ICalendar/Period.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/ICalendar/Period.php
index 7632cb4d1..da9d972b1 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/ICalendar/Period.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/ICalendar/Period.php
@@ -64,14 +64,17 @@ class Period extends Property
     public function setJsonValue(array $value): void
     {
         $value = array_map(
-            function ($item) {
-                return strtr(implode('/', $item), [':' => '', '-' => '']);
-            },
+            fn ($item) => strtr(implode('/', $item), [':' => '', '-' => '']),
             $value
         );
         parent::setJsonValue($value);
     }
 
+    public function appendUtc(string $strDate)
+    {
+        return !str_ends_with($strDate, 'Z') ? '' : 'Z';
+    }
+
     /**
      * Returns the value, in the format it should be encoded for json.
      *
@@ -83,21 +86,21 @@ class Period extends Property
     {
         $return = [];
         foreach ($this->getParts() as $item) {
-            list($start, $end) = explode('/', $item, 2);
+            [$start, $end] = explode('/', (string) $item, 2);
 
-            $start = DateTimeParser::parseDateTime($start);
+            $startDt = DateTimeParser::parseDateTime($start)->format('Y-m-d\\TH:i:s').$this->appendUtc($start);
 
             // This is a duration value.
             if ('P' === $end[0]) {
                 $return[] = [
-                    $start->format('Y-m-d\\TH:i:s'),
+                    $startDt,
                     $end,
                 ];
             } else {
-                $end = DateTimeParser::parseDateTime($end);
+                $endDt = DateTimeParser::parseDateTime($end)->format('Y-m-d\\TH:i:s').$this->appendUtc($end);
                 $return[] = [
-                    $start->format('Y-m-d\\TH:i:s'),
-                    $end->format('Y-m-d\\TH:i:s'),
+                    $startDt,
+                    $endDt,
                 ];
             }
         }
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/ICalendar/Recur.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/ICalendar/Recur.php
index 10081673e..f3d45158a 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/ICalendar/Recur.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/ICalendar/Recur.php
@@ -29,14 +29,14 @@ class Recur extends Property
     /**
      * Reference to the parent object, if this is not the top object.
      */
-    public ?Node $parent;
+    public ?Node $parent = null;
 
     /**
      * Updates the current value.
      *
      * This may be either a single, or multiple strings in an array.
      *
-     * @param string|array $value
+     * @param string|array|object $value
      */
     public function setValue($value): void
     {
@@ -52,17 +52,17 @@ class Recur extends Property
                     $v = strtoupper($v);
 
                     // The value had multiple sub-values
-                    if (false !== strpos($v, ',')) {
+                    if (str_contains($v, ',')) {
                         $v = explode(',', $v);
                     }
-                    if (0 === strcmp($k, 'until')) {
+                    if (0 === strcmp((string) $k, 'until')) {
                         $v = strtr($v, [':' => '', '-' => '']);
                     }
                 } elseif (is_array($v)) {
-                    $v = array_map('strtoupper', $v);
+                    $v = array_map(strtoupper(...), $v);
                 }
 
-                $newVal[strtoupper($k)] = $v;
+                $newVal[strtoupper((string) $k)] = $v;
             }
             $this->value = $newVal;
         } elseif (is_string($value)) {
@@ -151,13 +151,13 @@ class Recur extends Property
     {
         $values = [];
         foreach ($this->getParts() as $k => $v) {
-            if (0 === strcmp($k, 'UNTIL')) {
+            if (0 === strcmp((string) $k, 'UNTIL')) {
                 $date = new DateTime($this->root, null, $v);
-                $values[strtolower($k)] = $date->getJsonValue()[0];
-            } elseif (0 === strcmp($k, 'COUNT')) {
-                $values[strtolower($k)] = intval($v);
+                $values[strtolower((string) $k)] = $date->getJsonValue()[0];
+            } elseif (0 === strcmp((string) $k, 'COUNT')) {
+                $values[strtolower((string) $k)] = intval($v);
             } else {
-                $values[strtolower($k)] = $v;
+                $values[strtolower((string) $k)] = $v;
             }
         }
 
@@ -186,7 +186,7 @@ class Recur extends Property
         $newValue = [];
         foreach (explode(';', $value) as $part) {
             // Skipping empty parts.
-            if (empty($part)) {
+            if ('' === $part) {
                 continue;
             }
 
@@ -196,10 +196,10 @@ class Recur extends Property
                 throw new InvalidDataException('The supplied iCalendar RRULE part is incorrect: '.$part);
             }
 
-            list($partName, $partValue) = $parts;
+            [$partName, $partValue] = $parts;
 
             // The value itself had multiple values..
-            if (false !== strpos($partValue, ',')) {
+            if (str_contains($partValue, ',')) {
                 $partValue = explode(',', $partValue);
             }
             $newValue[$partName] = $partValue;
@@ -243,7 +243,7 @@ class Recur extends Property
                 if ($repair) {
                     unset($values[$key]);
                 }
-            } elseif ('BYMONTH' == $key) {
+            } elseif ('BYMONTH' === $key) {
                 $byMonth = (array) $value;
                 foreach ($byMonth as $i => $v) {
                     if (!is_numeric($v) || (int) $v < 1 || (int) $v > 12) {
@@ -262,13 +262,13 @@ class Recur extends Property
                     }
                 }
                 // if there is no valid entry left, remove the whole value
-                if (is_array($value) && empty($values[$key])) {
+                if (is_array($value) && ([] === $values[$key])) {
                     unset($values[$key]);
                 }
-            } elseif ('BYWEEKNO' == $key) {
+            } elseif ('BYWEEKNO' === $key) {
                 $byWeekNo = (array) $value;
                 foreach ($byWeekNo as $i => $v) {
-                    if (!is_numeric($v) || (int) $v < -53 || 0 == (int) $v || (int) $v > 53) {
+                    if (!is_numeric($v) || (int) $v < -53 || 0 === (int) $v || (int) $v > 53) {
                         $warnings[] = [
                             'level' => $repair ? 1 : 3,
                             'message' => 'BYWEEKNO in RRULE must have value(s) from -53 to -1, or 1 to 53!',
@@ -284,13 +284,13 @@ class Recur extends Property
                     }
                 }
                 // if there is no valid entry left, remove the whole value
-                if (is_array($value) && empty($values[$key])) {
+                if (is_array($value) && ([] === $values[$key])) {
                     unset($values[$key]);
                 }
-            } elseif ('BYYEARDAY' == $key) {
+            } elseif ('BYYEARDAY' === $key) {
                 $byYearDay = (array) $value;
                 foreach ($byYearDay as $i => $v) {
-                    if (!is_numeric($v) || (int) $v < -366 || 0 == (int) $v || (int) $v > 366) {
+                    if (!is_numeric($v) || (int) $v < -366 || 0 === (int) $v || (int) $v > 366) {
                         $warnings[] = [
                             'level' => $repair ? 1 : 3,
                             'message' => 'BYYEARDAY in RRULE must have value(s) from -366 to -1, or 1 to 366!',
@@ -306,7 +306,7 @@ class Recur extends Property
                     }
                 }
                 // if there is no valid entry left, remove the whole value
-                if (is_array($value) && empty($values[$key])) {
+                if (is_array($value) && ([] === $values[$key])) {
                     unset($values[$key]);
                 }
             }
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/IntegerValue.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/IntegerValue.php
index f1ae55d17..1cd7273cc 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/IntegerValue.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/IntegerValue.php
@@ -62,7 +62,7 @@ class IntegerValue extends Property
      */
     public function setXmlValue(array $value): void
     {
-        $value = array_map('intval', $value);
+        $value = array_map(intval(...), $value);
         parent::setXmlValue($value);
     }
 }
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/Text.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/Text.php
index c59029059..e585026fc 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/Text.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/Text.php
@@ -71,7 +71,7 @@ class Text extends Property
         // 2. structured value properties
         //
         // The former is always separated by a comma, the latter by semicolon.
-        if (in_array($name, $this->structuredValues)) {
+        if (in_array($name, $this->structuredValues, true)) {
             $this->delimiter = ';';
         }
 
@@ -155,7 +155,7 @@ class Text extends Property
         // Structured text values should always be returned as a single
         // array-item. Multi-value text should be returned as multiple items in
         // the top-array.
-        if (in_array($this->name, $this->structuredValues)) {
+        if (in_array($this->name, $this->structuredValues, true)) {
             return [$this->getParts()];
         }
 
@@ -213,7 +213,7 @@ class Text extends Property
 
         // If the resulting value contains a \n, we must encode it as
         // quoted-printable.
-        if (false !== \strpos($val, "\n")) {
+        if (str_contains((string) $val, "\n")) {
             $str .= ';ENCODING=QUOTED-PRINTABLE:';
             $lastLine = $str;
             $out = '';
@@ -222,13 +222,13 @@ class Text extends Property
             // encode newlines for us. Specifically, the \r\n sequence must in
             // vcards be encoded as =0D=OA and we must insert soft-newlines
             // every 75 bytes.
-            for ($ii = 0; $ii < \strlen($val); ++$ii) {
+            for ($ii = 0; $ii < \strlen((string) $val); ++$ii) {
                 $ord = \ord($val[$ii]);
                 // These characters are encoded as themselves.
                 if ($ord >= 32 && $ord <= 126) {
                     $lastLine .= $val[$ii];
                 } else {
-                    $lastLine .= '='.\strtoupper(\bin2hex($val[$ii]));
+                    $lastLine .= '='.\strtoupper(\bin2hex((string) $val[$ii]));
                 }
                 if (\strlen($lastLine) >= 75) {
                     // Soft line break
@@ -241,22 +241,21 @@ class Text extends Property
             }
 
             return $out;
-        } else {
-            $str .= ':'.$val;
+        }
+        $str .= ':'.$val;
 
-            $str = \preg_replace(
-                '/(
+        $str = \preg_replace(
+            '/(
                     (?:^.)?         # 1 additional byte in first line because of missing single space (see next line)
                     .{1,74}         # max 75 bytes per line (1 byte is used for a single space added after every CRLF)
                     (?![\x80-\xbf]) # prevent splitting multibyte characters
                 )/x',
-                "$1\r\n ",
-                $str
-            );
+            "$1\r\n ",
+            $str
+        );
 
-            // remove single space after last CRLF
-            return \substr($str, 0, -1);
-        }
+        // remove single space after last CRLF
+        return \substr((string) $str, 0, -1);
     }
 
     /**
@@ -271,7 +270,7 @@ class Text extends Property
             foreach ($items as $i => $item) {
                 $writer->writeElement(
                     $item,
-                    !empty($values[$i]) ? $values[$i] : null
+                    ('' !== $values[$i] && [] !== $values[$i]) ? $values[$i] : null
                 );
             }
         };
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/Time.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/Time.php
index ed314fc0d..9c4016c64 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/Time.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/Time.php
@@ -104,7 +104,7 @@ class Time extends Text
                 $timeStr .= 'Z';
             } else {
                 $timeStr .=
-                    preg_replace('/([0-9]{2})([0-9]{2})$/', '$1:$2', $parts['timezone']);
+                    preg_replace('/([0-9]{2})([0-9]{2})$/', '$1:$2', (string) $parts['timezone']);
             }
         }
 
@@ -118,9 +118,7 @@ class Time extends Text
     public function setXmlValue(array $value): void
     {
         $value = array_map(
-            function ($value) {
-                return str_replace(':', '', $value);
-            },
+            fn ($value) => str_replace(':', '', $value),
             $value
         );
         parent::setXmlValue($value);
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/Uri.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/Uri.php
index 228b7090f..dce7bf4bb 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/Uri.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/Uri.php
@@ -38,7 +38,7 @@ class Uri extends Text
     public function parameters(): array
     {
         $parameters = parent::parameters();
-        if (!isset($parameters['VALUE']) && in_array($this->name, ['URL', 'PHOTO'])) {
+        if (!isset($parameters['VALUE']) && in_array($this->name, ['URL', 'PHOTO'], true)) {
             // If we are encoding a URI value, and this URI value has no
             // VALUE=URI parameter, we add it anyway.
             //
@@ -74,14 +74,10 @@ class Uri extends Text
             $matches = preg_split($regex, $val, -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY);
             $newVal = '';
             foreach ($matches as $match) {
-                switch ($match) {
-                    case '\:':
-                        $newVal .= ':';
-                        break;
-                    default:
-                        $newVal .= $match;
-                        break;
-                }
+                match ($match) {
+                    '\:' => $newVal .= ':',
+                    default => $newVal .= $match,
+                };
             }
             $this->value = $newVal;
         } else {
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/UtcOffset.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/UtcOffset.php
index 09aab0151..52d81f1f6 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/UtcOffset.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/UtcOffset.php
@@ -42,9 +42,7 @@ class UtcOffset extends Text
     public function setJsonValue(array $value): void
     {
         $value = array_map(
-            function ($value) {
-                return str_replace(':', '', $value);
-            },
+            fn ($value) => str_replace(':', '', $value),
             $value
         );
         parent::setJsonValue($value);
@@ -58,10 +56,8 @@ class UtcOffset extends Text
     public function getJsonValue(): array
     {
         return array_map(
-            function ($value) {
-                return substr($value, 0, -2).':'.
-                       substr($value, -2);
-            },
+            fn ($value) => substr((string) $value, 0, -2).':'.
+                   substr((string) $value, -2),
             parent::getJsonValue()
         );
     }
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/VCard/DateAndOrTime.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/VCard/DateAndOrTime.php
index e87bf1b3a..9a7693961 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/VCard/DateAndOrTime.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Property/VCard/DateAndOrTime.php
@@ -77,7 +77,7 @@ class DateAndOrTime extends Property
     public function setDateTime(\DateTimeInterface $dt): void
     {
         $tz = $dt->getTimeZone();
-        $isUtc = in_array($tz->getName(), ['UTC', 'GMT', 'Z']);
+        $isUtc = in_array($tz->getName(), ['UTC', 'GMT', 'Z'], true);
 
         if ($isUtc) {
             $value = $dt->format('Ymd\\THis\\Z');
@@ -232,14 +232,10 @@ class DateAndOrTime extends Property
         $value = '';
 
         // $d = defined
-        $d = function ($part) use ($parts): bool {
-            return !is_null($parts[$part]);
-        };
+        $d = (fn ($part): bool => !is_null($parts[$part]));
 
         // $r = read
-        $r = function ($part) use ($parts) {
-            return $parts[$part];
-        };
+        $r = (fn ($part) => $parts[$part]);
 
         // From the Relax NG Schema.
         //
@@ -341,7 +337,7 @@ class DateAndOrTime extends Property
 
         try {
             DateTimeParser::parseVCardDateTime($value);
-        } catch (InvalidDataException $e) {
+        } catch (InvalidDataException) {
             $messages[] = [
                 'level' => 3,
                 'message' => 'The supplied value ('.$value.') is not a correct DATE-AND-OR-TIME property',
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Recur/EventIterator.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Recur/EventIterator.php
index 2c93bcf4e..5db409350 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Recur/EventIterator.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Recur/EventIterator.php
@@ -91,9 +91,7 @@ class EventIterator implements \Iterator
      */
     public function __construct($input, ?string $uid = null, ?\DateTimeZone $timeZone = null)
     {
-        if (is_null($timeZone)) {
-            $timeZone = new \DateTimeZone('UTC');
-        }
+        $timeZone ??= new \DateTimeZone('UTC');
         $this->timeZone = $timeZone;
 
         if (is_array($input)) {
@@ -164,8 +162,12 @@ class EventIterator implements \Iterator
         }
 
         if (isset($this->masterEvent->RDATE)) {
+            $rdateValues = [];
+            foreach ($this->masterEvent->RDATE as $rdate) {
+                $rdateValues = array_merge($rdateValues, $rdate->getParts());
+            }
             $this->recurIterator = new RDateIterator(
-                $this->masterEvent->RDATE->getParts(),
+                $rdateValues,
                 $this->startDate
             );
         } elseif (isset($this->masterEvent->RRULE)) {
@@ -228,11 +230,10 @@ class EventIterator implements \Iterator
         }
         if ($this->currentOverriddenEvent && $this->currentOverriddenEvent->DTEND) {
             return $this->currentOverriddenEvent->DTEND->getDateTime($this->timeZone);
-        } else {
-            $end = clone $this->currentDate;
-
-            return $end->modify('+'.$this->eventDuration.' seconds');
         }
+        $end = clone $this->currentDate;
+
+        return $end->modify('+'.$this->eventDuration.' seconds');
     }
 
     /**
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Recur/RDateIterator.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Recur/RDateIterator.php
index 4ad688f9d..b9bd0beff 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Recur/RDateIterator.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Recur/RDateIterator.php
@@ -26,9 +26,13 @@ class RDateIterator implements \Iterator
      *
      * @param string|array $rrule
      */
-    public function __construct($rrule, \DateTimeInterface $start)
+    public function __construct($rrule, /**
+     * The reference start date/time for the rrule.
+     *
+     * All calculations are based on this initial date.
+     */
+        protected \DateTimeInterface $startDate)
     {
-        $this->startDate = $start;
         $this->parseRDate($rrule);
         $this->currentDate = clone $this->startDate;
     }
@@ -117,13 +121,6 @@ class RDateIterator implements \Iterator
         }
     }
 
-    /**
-     * The reference start date/time for the rrule.
-     *
-     * All calculations are based on this initial date.
-     */
-    protected \DateTimeInterface $startDate;
-
     /**
      * The date of the current iteration. You can get this by calling
      * ->current().
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Recur/RRuleIterator.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Recur/RRuleIterator.php
index ff276a697..6f1f28ae3 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Recur/RRuleIterator.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Recur/RRuleIterator.php
@@ -37,9 +37,13 @@ class RRuleIterator implements \Iterator
      *
      * @throws InvalidDataException
      */
-    public function __construct($rrule, \DateTimeInterface $start)
+    public function __construct($rrule, /**
+     * The reference start date/time for the rrule.
+     *
+     * All calculations are based on this initial date.
+     */
+        protected \DateTimeInterface $startDate)
     {
-        $this->startDate = $start;
         $this->parseRRule($rrule);
         $this->currentDate = clone $this->startDate;
     }
@@ -146,13 +150,6 @@ class RRuleIterator implements \Iterator
         }
     }
 
-    /**
-     * The reference start date/time for the rrule.
-     *
-     * All calculations are based on this initial date.
-     */
-    protected \DateTimeInterface $startDate;
-
     /**
      * The date of the current iteration. You can get this by calling
      * ->current().
@@ -357,23 +354,23 @@ class RRuleIterator implements \Iterator
         }
 
         $recurrenceHours = [];
-        if (!empty($this->byHour)) {
+        if ($this->byHour) {
             $recurrenceHours = $this->getHours();
         }
 
         $recurrenceDays = [];
-        if (!empty($this->byDay)) {
+        if ($this->byDay) {
             $recurrenceDays = $this->getDays();
         }
 
         $recurrenceMonths = [];
-        if (!empty($this->byMonth)) {
+        if ($this->byMonth) {
             $recurrenceMonths = $this->getMonths();
         }
 
         do {
             if ($this->byHour) {
-                if ('23' == $this->currentDate->format('G')) {
+                if ('23' === $this->currentDate->format('G')) {
                     // to obey the interval rule
                     $this->currentDate = $this->currentDate->modify('+'.($this->interval - 1).' days');
                 }
@@ -398,9 +395,9 @@ class RRuleIterator implements \Iterator
                 return;
             }
         } while (
-            ($this->byDay && !in_array($currentDay, $recurrenceDays))
-            || ($this->byHour && !in_array($currentHour, $recurrenceHours))
-            || ($this->byMonth && !in_array($currentMonth, $recurrenceMonths))
+            ($this->byDay && !in_array((int) $currentDay, $recurrenceDays, true))
+            || ($this->byHour && !in_array($currentHour, $recurrenceHours, true))
+            || ($this->byMonth && !in_array($currentMonth, $recurrenceMonths, true))
         );
     }
 
@@ -442,18 +439,18 @@ class RRuleIterator implements \Iterator
             $currentHour = (int) $this->currentDate->format('G');
 
             // We need to roll over to the next week
-            if ($currentDay === $firstDay && (!$this->byHour || '0' == $currentHour)) {
+            if ($currentDay === $firstDay && (!$this->byHour || 0 === $currentHour)) {
                 $this->currentDate = $this->currentDate->modify('+'.($this->interval - 1).' weeks');
 
                 // We need to go to the first day of this week, but only if we
                 // are not already on this first day of this week.
-                if ($this->currentDate->format('w') != $firstDay) {
+                if ((int) $this->currentDate->format('w') !== $firstDay) {
                     $this->currentDate = $this->currentDate->modify('last '.$this->dayNames[$this->dayMap[$this->weekStart]]);
                 }
             }
 
             // We have a match
-        } while (($this->byDay && !in_array($currentDay, $recurrenceDays)) || ($this->byHour && !in_array($currentHour, $recurrenceHours)));
+        } while (($this->byDay && !in_array($currentDay, $recurrenceDays, true)) || ($this->byHour && !in_array((string) $currentHour, $recurrenceHours, true)));
     }
 
     /**
@@ -476,14 +473,14 @@ class RRuleIterator implements \Iterator
                     ++$increase;
                     $tempDate = clone $this->currentDate;
                     $tempDate = $tempDate->modify('+ '.($this->interval * $increase).' months '.$this->startTime());
-                } while ($tempDate->format('j') != $currentDayOfMonth);
+                } while ($tempDate->format('j') !== $currentDayOfMonth);
                 $this->currentDate = $tempDate;
             }
 
             return;
         }
 
-        $occurrence = -1;
+        $selectedOccurrence = -1;
         while (true) {
             $occurrences = $this->getMonthlyOccurrences();
 
@@ -491,6 +488,7 @@ class RRuleIterator implements \Iterator
                 // The first occurrence that's higher than the current
                 // day of the month wins.
                 if ($occurrence > $currentDayOfMonth) {
+                    $selectedOccurrence = $occurrence;
                     break 2;
                 }
             }
@@ -533,7 +531,7 @@ class RRuleIterator implements \Iterator
         $this->currentDate = $this->currentDate->setDate(
             (int) $this->currentDate->format('Y'),
             (int) $this->currentDate->format('n'),
-            (int) $occurrence
+            (int) $selectedOccurrence
         )->modify($this->startTime());
     }
 
@@ -547,9 +545,9 @@ class RRuleIterator implements \Iterator
         $currentDayOfMonth = $this->currentDate->format('j');
 
         // No sub-rules, so we just advance by year
-        if (empty($this->byMonth)) {
+        if (!$this->byMonth) {
             // Unless it was a leap day!
-            if (2 == $currentMonth && 29 == $currentDayOfMonth) {
+            if (2 === (int) $currentMonth && 29 === (int) $currentDayOfMonth) {
                 $counter = 0;
                 do {
                     ++$counter;
@@ -563,7 +561,7 @@ class RRuleIterator implements \Iterator
                     // functions instead.
                     $nextDate = clone $this->currentDate;
                     $nextDate = $nextDate->modify('+ '.($this->interval * $counter).' years');
-                } while (2 != $nextDate->format('n'));
+                } while (2 !== (int) $nextDate->format('n'));
 
                 $this->currentDate = $nextDate;
 
@@ -634,7 +632,7 @@ class RRuleIterator implements \Iterator
                             $date = $date->sub(new \DateInterval('P'.abs($byYearDay + 1).'D'));
                         }
 
-                        if ($date > $this->currentDate && in_array($date->format('N'), $dayOffsets)) {
+                        if ($date > $this->currentDate && in_array((int) $date->format('N'), $dayOffsets, true)) {
                             $checkDates[] = $date;
                         }
                     }
@@ -665,7 +663,7 @@ class RRuleIterator implements \Iterator
         // If we got a byDay or getMonthDay filter, we must first expand
         // further.
         if ($this->byDay || $this->byMonthDay) {
-            $occurrence = -1;
+            $selectedOccurrence = -1;
             while (true) {
                 $occurrences = $this->getMonthlyOccurrences();
 
@@ -677,7 +675,8 @@ class RRuleIterator implements \Iterator
                     if ($occurrence > $currentDayOfMonth || $advancedToNewMonth) {
                         // only consider byMonth matches,
                         // otherwise, we don't follow RRule correctly
-                        if (in_array($currentMonth, $this->byMonth)) {
+                        if (in_array((string) $currentMonth, $this->byMonth, true)) {
+                            $selectedOccurrence = $occurrence;
                             break 2;
                         }
                     }
@@ -693,12 +692,12 @@ class RRuleIterator implements \Iterator
                         $currentYear += $this->interval;
                         $currentMonth = 1;
                     }
-                } while (!in_array($currentMonth, $this->byMonth));
+                } while (!in_array((string) $currentMonth, $this->byMonth, true));
 
                 $this->currentDate = $this->currentDate->setDate(
                     (int) $currentYear,
-                    (int) $currentMonth,
-                    (int) $currentDayOfMonth
+                    $currentMonth,
+                    $currentDayOfMonth
                 );
 
                 // To prevent running this forever (better: until we hit the max date of DateTimeImmutable) we simply
@@ -714,28 +713,25 @@ class RRuleIterator implements \Iterator
             $this->currentDate = $this->currentDate->setDate(
                 (int) $currentYear,
                 (int) $currentMonth,
-                (int) $occurrence
-            )->modify($this->startTime());
-
-            return;
-        } else {
-            // These are the 'byMonth' rules, if there are no byDay or
-            // byMonthDay sub-rules.
-            do {
-                ++$currentMonth;
-                if ($currentMonth > 12) {
-                    $currentYear += $this->interval;
-                    $currentMonth = 1;
-                }
-            } while (!in_array($currentMonth, $this->byMonth));
-            $this->currentDate = $this->currentDate->setDate(
-                (int) $currentYear,
-                (int) $currentMonth,
-                (int) $currentDayOfMonth
+                (int) $selectedOccurrence
             )->modify($this->startTime());
 
             return;
         }
+        // These are the 'byMonth' rules, if there are no byDay or
+        // byMonthDay sub-rules.
+        do {
+            ++$currentMonth;
+            if ($currentMonth > 12) {
+                $currentYear += $this->interval;
+                $currentMonth = 1;
+            }
+        } while (!in_array((string) $currentMonth, $this->byMonth, true));
+        $this->currentDate = $this->currentDate->setDate(
+            (int) $currentYear,
+            $currentMonth,
+            (int) $currentDayOfMonth
+        )->modify($this->startTime());
     }
 
     /* }}} */
@@ -755,13 +751,14 @@ class RRuleIterator implements \Iterator
         }
 
         foreach ($rrule as $key => $value) {
-            $key = strtoupper($key);
+            $key = strtoupper((string) $key);
             switch ($key) {
                 case 'FREQ':
-                    $value = strtolower($value);
+                    $value = strtolower((string) $value);
                     if (!in_array(
                         $value,
-                        ['secondly', 'minutely', 'hourly', 'daily', 'weekly', 'monthly', 'yearly']
+                        ['secondly', 'minutely', 'hourly', 'daily', 'weekly', 'monthly', 'yearly'],
+                        true
                     )) {
                         throw new InvalidDataException('Unknown value for FREQ='.strtoupper($value));
                     }
@@ -809,7 +806,7 @@ class RRuleIterator implements \Iterator
                 case 'BYDAY':
                     $value = (array) $value;
                     foreach ($value as $part) {
-                        if (!preg_match('#^  (-|\+)? ([1-5])? (MO|TU|WE|TH|FR|SA|SU) $# xi', $part)) {
+                        if (!preg_match('#^  (-|\+)? ([1-5])? (MO|TU|WE|TH|FR|SA|SU) $#xi', (string) $part)) {
                             throw new InvalidDataException('Invalid part in BYDAY clause: '.$part);
                         }
                     }
@@ -823,7 +820,7 @@ class RRuleIterator implements \Iterator
                 case 'BYYEARDAY':
                     $this->byYearDay = (array) $value;
                     foreach ($this->byYearDay as $byYearDay) {
-                        if (!is_numeric($byYearDay) || (int) $byYearDay < -366 || 0 == (int) $byYearDay || (int) $byYearDay > 366) {
+                        if (!is_numeric($byYearDay) || (int) $byYearDay < -366 || 0 === (int) $byYearDay || (int) $byYearDay > 366) {
                             throw new InvalidDataException('BYYEARDAY in RRULE must have value(s) from 1 to 366, or -366 to -1!');
                         }
                     }
@@ -832,7 +829,7 @@ class RRuleIterator implements \Iterator
                 case 'BYWEEKNO':
                     $this->byWeekNo = (array) $value;
                     foreach ($this->byWeekNo as $byWeekNo) {
-                        if (!is_numeric($byWeekNo) || (int) $byWeekNo < -53 || 0 == (int) $byWeekNo || (int) $byWeekNo > 53) {
+                        if (!is_numeric($byWeekNo) || (int) $byWeekNo < -53 || 0 === (int) $byWeekNo || (int) $byWeekNo > 53) {
                             throw new InvalidDataException('BYWEEKNO in RRULE must have value(s) from 1 to 53, or -53 to -1!');
                         }
                     }
@@ -852,7 +849,7 @@ class RRuleIterator implements \Iterator
                     break;
 
                 case 'WKST':
-                    $this->weekStart = strtoupper($value);
+                    $this->weekStart = strtoupper((string) $value);
                     break;
 
                 default:
@@ -892,7 +889,7 @@ class RRuleIterator implements \Iterator
         // that point and add it to the results.
         if ($this->byDay) {
             foreach ($this->byDay as $day) {
-                $dayName = $this->dayNames[$this->dayMap[substr($day, -2)]];
+                $dayName = $this->dayNames[$this->dayMap[substr((string) $day, -2)]];
 
                 // Dayname will be something like 'wednesday'. Now we need to find
                 // all wednesdays in this month.
@@ -913,8 +910,8 @@ class RRuleIterator implements \Iterator
                 // So now we have 'all wednesdays' for month. It is however
                 // possible that the user only really wanted the 1st, 2nd or last
                 // wednesday.
-                if (strlen($day) > 2) {
-                    $offset = (int) substr($day, 0, -2);
+                if (strlen((string) $day) > 2) {
+                    $offset = (int) substr((string) $day, 0, -2);
 
                     if ($offset > 0) {
                         // It is possible that the day does not exist, such as a
@@ -949,7 +946,7 @@ class RRuleIterator implements \Iterator
                     $byMonthDayResults[] = $monthDay;
                 } else {
                     // Negative values
-                    $byMonthDayResults[] = $startDate->format('t') + 1 + $monthDay;
+                    $byMonthDayResults[] = (int) $startDate->format('t') + 1 + $monthDay;
                 }
             }
         }
@@ -1018,7 +1015,7 @@ class RRuleIterator implements \Iterator
             // The day may be preceded with a positive (+n) or
             // negative (-n) integer. However, this does not make
             // sense in 'weekly' so we ignore it here.
-            $recurrenceDays[] = $this->dayMap[substr($byDay, -2)];
+            $recurrenceDays[] = $this->dayMap[substr((string) $byDay, -2)];
         }
 
         return $recurrenceDays;
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Splitter/ICalendar.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Splitter/ICalendar.php
index 79f0bd443..edbba68cc 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Splitter/ICalendar.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Splitter/ICalendar.php
@@ -96,8 +96,8 @@ class ICalendar implements SplitterInterface
             }
 
             return $object;
-        } else {
-            return null;
         }
+
+        return null;
     }
 }
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Splitter/VCard.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Splitter/VCard.php
index 40775a335..a802dbe75 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Splitter/VCard.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Splitter/VCard.php
@@ -22,13 +22,6 @@ use Sabre\VObject\Parser\MimeDir;
  */
 class VCard implements SplitterInterface
 {
-    /**
-     * File handle.
-     *
-     * @var resource
-     */
-    protected $input;
-
     /**
      * Persistent parser.
      */
@@ -42,10 +35,12 @@ class VCard implements SplitterInterface
      * @param resource $input
      * @param int      $options parser options, see the OPTIONS constants
      */
-    public function __construct($input, int $options = 0)
+    public function __construct(/**
+     * File handle.
+     */
+        protected $input, int $options = 0)
     {
-        $this->input = $input;
-        $this->parser = new MimeDir($input, $options);
+        $this->parser = new MimeDir($this->input, $options);
     }
 
     /**
@@ -64,7 +59,7 @@ class VCard implements SplitterInterface
             if (!$object instanceof Component\VCard) {
                 throw new VObject\ParseException('The supplied input contained non-VCARD data.');
             }
-        } catch (VObject\EofException $e) {
+        } catch (VObject\EofException) {
             return null;
         }
 
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/TimeZoneUtil.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/TimeZoneUtil.php
index 2cd458578..19333e86a 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/TimeZoneUtil.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/TimeZoneUtil.php
@@ -41,9 +41,7 @@ class TimeZoneUtil
 
     private static function getInstance(): self
     {
-        if (null === self::$instance) {
-            self::$instance = new self();
-        }
+        self::$instance ??= new self();
 
         return self::$instance;
     }
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/TimezoneGuesser/FindFromOffset.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/TimezoneGuesser/FindFromOffset.php
index d50cb969c..418fd6ba9 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/TimezoneGuesser/FindFromOffset.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/TimezoneGuesser/FindFromOffset.php
@@ -24,6 +24,24 @@ class FindFromOffset implements TimezoneFinder
             // @codeCoverageIgnoreEnd
         }
 
+        if (0 === strncasecmp($tzid, 'UTC', 3)) {
+            $offset = substr($tzid, 3);
+            if (6 === strlen($offset) && ':' === $offset[3]) {
+                $offset = substr($offset, 0, 3).substr($offset, 4);
+            }
+
+            if (5 !== strlen($offset)
+                || ('+' !== $offset[0] && '-' !== $offset[0])
+                || 4 !== strspn(substr($offset, 1), '0123456789')
+                || (int) substr($offset, 1, 2) > 23
+                || (int) substr($offset, 3, 2) > 59
+            ) {
+                return null;
+            }
+
+            return new \DateTimeZone($offset);
+        }
+
         return null;
     }
 }
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/TimezoneGuesser/FindFromTimezoneIdentifier.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/TimezoneGuesser/FindFromTimezoneIdentifier.php
index ba84d45eb..5e56b82f1 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/TimezoneGuesser/FindFromTimezoneIdentifier.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/TimezoneGuesser/FindFromTimezoneIdentifier.php
@@ -40,13 +40,13 @@ class FindFromTimezoneIdentifier implements TimezoneFinder
 
         try {
             if (
-                in_array($tzid, $tzIdentifiers)
+                in_array($tzid, $tzIdentifiers, true)
                 || preg_match('/^GMT(\+|-)([0-9]{4})$/', $tzid, $matches)
-                || in_array($tzid, $this->getIdentifiersBC())
+                || in_array($tzid, $this->getIdentifiersBC(), true)
             ) {
                 return new \DateTimeZone($tzid);
             }
-        } catch (\Exception $e) {
+        } catch (\Exception) {
         }
 
         return null;
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/TimezoneGuesser/FindFromTimezoneMap.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/TimezoneGuesser/FindFromTimezoneMap.php
index 83466b28e..5beb5450d 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/TimezoneGuesser/FindFromTimezoneMap.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/TimezoneGuesser/FindFromTimezoneMap.php
@@ -18,11 +18,18 @@ class FindFromTimezoneMap implements TimezoneFinder
         '/^\((UTC|GMT)(\+|\-)[\d]{2}\.[\d]{2}\) (.*)/',
     ];
 
+    /**
+     * @throws void
+     */
     public function find(string $tzid, ?bool $failIfUncertain = false): ?\DateTimeZone
     {
         // Next, we check if the tzid is somewhere in our tzid map.
         if ($this->hasTzInMap($tzid)) {
-            return new \DateTimeZone($this->getTzFromMap($tzid));
+            try {
+                return new \DateTimeZone($this->getTzFromMap($tzid));
+            } catch (\Exception) {
+                return null;
+            }
         }
 
         // Some Microsoft products prefix the offset first, so let's strip that off
@@ -34,7 +41,11 @@ class FindFromTimezoneMap implements TimezoneFinder
             }
             $tzidAlternate = $matches[3];
             if ($this->hasTzInMap($tzidAlternate)) {
-                return new \DateTimeZone($this->getTzFromMap($tzidAlternate));
+                try {
+                    return new \DateTimeZone($this->getTzFromMap($tzidAlternate));
+                } catch (\Exception) {
+                    return null;
+                }
             }
         }
 
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/TimezoneGuesser/GuessFromLicEntry.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/TimezoneGuesser/GuessFromLicEntry.php
index 486b33796..7212117f7 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/TimezoneGuesser/GuessFromLicEntry.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/TimezoneGuesser/GuessFromLicEntry.php
@@ -23,7 +23,7 @@ class GuessFromLicEntry implements TimezoneGuesser
         // Libical generators may specify strings like
         // "SystemV/EST5EDT". For those we must remove the
         // SystemV part.
-        if ('SystemV/' === substr($lic, 0, 8)) {
+        if (str_starts_with($lic, 'SystemV/')) {
             $lic = substr($lic, 8);
         }
 
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/TimezoneGuesser/GuessFromMsTzId.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/TimezoneGuesser/GuessFromMsTzId.php
index 392333cb0..82060bd27 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/TimezoneGuesser/GuessFromMsTzId.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/TimezoneGuesser/GuessFromMsTzId.php
@@ -105,7 +105,7 @@ class GuessFromMsTzId implements TimezoneGuesser
         $cdoId = (int) $vtimezone->{'X-MICROSOFT-CDO-TZID'}->getValue();
 
         // 2 can mean both Europe/Lisbon and Europe/Sarajevo.
-        if (2 === $cdoId && false !== strpos((string) $vtimezone->TZID, 'Sarajevo')) {
+        if (2 === $cdoId && str_contains((string) $vtimezone->TZID, 'Sarajevo')) {
             return new \DateTimeZone('Europe/Sarajevo');
         }
 
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/VCardConverter.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/VCardConverter.php
index ff8fe3f81..39969d558 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/VCardConverter.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/VCardConverter.php
@@ -38,10 +38,10 @@ class VCardConverter
             return clone $input;
         }
 
-        if (!in_array($inputVersion, [Document::VCARD21, Document::VCARD30, Document::VCARD40])) {
+        if (!in_array($inputVersion, [Document::VCARD21, Document::VCARD30, Document::VCARD40], true)) {
             throw new \InvalidArgumentException('Only vCard 2.1, 3.0 and 4.0 are supported for the input data');
         }
-        if (!in_array($targetVersion, [Document::VCARD30, Document::VCARD40])) {
+        if (!in_array($targetVersion, [Document::VCARD30, Document::VCARD40], true)) {
             throw new \InvalidArgumentException('You can only use vCard 3.0 or 4.0 for the target version');
         }
 
@@ -69,7 +69,7 @@ class VCardConverter
     protected function convertProperty(Component\VCard $input, Component\VCard $output, Property $property, int $targetVersion): void
     {
         // Skipping these, those are automatically added.
-        if (in_array($property->name, ['VERSION', 'PRODID'])) {
+        if (in_array($property->name, ['VERSION', 'PRODID'], true)) {
             return;
         }
 
@@ -93,7 +93,7 @@ class VCardConverter
         );
 
         if (Document::VCARD30 === $targetVersion) {
-            if ($property instanceof Uri && in_array($property->name, ['PHOTO', 'LOGO', 'SOUND'])) {
+            if ($property instanceof Uri && in_array($property->name, ['PHOTO', 'LOGO', 'SOUND'], true)) {
                 /** @var Uri $newProperty */
                 $newProperty = $this->convertUriToBinary($output, $newProperty);
             } elseif ($property instanceof Property\VCard\DateAndOrTime) {
@@ -111,7 +111,7 @@ class VCardConverter
                     $newProperty['X-APPLE-OMIT-YEAR'] = '1604';
                 }
 
-                if ('ANNIVERSARY' == $newProperty->name) {
+                if ('ANNIVERSARY' === $newProperty->name) {
                     // Microsoft non-standard anniversary
                     $newProperty->name = 'X-ANNIVERSARY';
 
@@ -127,7 +127,7 @@ class VCardConverter
                     $output->add('ITEM'.$x.'.X-ABLABEL', '_$!<Anniversary>!$_');
                 }
             } elseif ('KIND' === $property->name) {
-                switch (strtolower($property->getValue())) {
+                switch (strtolower((string) $property->getValue())) {
                     case 'org':
                         // vCard 3.0 does not have an equivalent to KIND:ORG,
                         // but apple has an extension that means the same
@@ -149,7 +149,7 @@ class VCardConverter
             }
         } elseif (Document::VCARD40 === $targetVersion) {
             // These properties were removed in vCard 4.0
-            if (in_array($property->name, ['NAME', 'MAILER', 'LABEL', 'CLASS'])) {
+            if (in_array($property->name, ['NAME', 'MAILER', 'LABEL', 'CLASS'], true)) {
                 return;
             }
 
@@ -171,12 +171,12 @@ class VCardConverter
             }
             switch ($property->name) {
                 case 'X-ABSHOWAS':
-                    if ('COMPANY' === strtoupper($property->getValue())) {
+                    if ('COMPANY' === strtoupper((string) $property->getValue())) {
                         $newProperty = $output->createProperty('KIND', 'ORG');
                     }
                     break;
                 case 'X-ADDRESSBOOKSERVER-KIND':
-                    if ('GROUP' === strtoupper($property->getValue())) {
+                    if ('GROUP' === strtoupper((string) $property->getValue())) {
                         $newProperty = $output->createProperty('KIND', 'GROUP');
                     }
                     break;
@@ -274,10 +274,11 @@ class VCardConverter
             $newTypes = [];
             foreach ($parameters['TYPE']->getParts() as $typePart) {
                 if (in_array(
-                    strtoupper($typePart),
-                    ['JPEG', 'PNG', 'GIF']
+                    strtoupper((string) $typePart),
+                    ['JPEG', 'PNG', 'GIF'],
+                    true
                 )) {
-                    $mimeType = 'image/'.strtolower($typePart);
+                    $mimeType = 'image/'.strtolower((string) $typePart);
                 } else {
                     $newTypes[] = $typePart;
                 }
@@ -292,7 +293,7 @@ class VCardConverter
             }
         }
 
-        $newProperty->setValue('data:'.$mimeType.';base64,'.base64_encode($value));
+        $newProperty->setValue('data:'.$mimeType.';base64,'.base64_encode((string) $value));
 
         return $newProperty;
     }
@@ -313,7 +314,7 @@ class VCardConverter
         $value = $newProperty->getValue();
 
         // Only converting data: uris
-        if ('data:' !== substr($value, 0, 5)) {
+        if (!str_starts_with((string) $value, 'data:')) {
             return $newProperty;
         }
 
@@ -325,12 +326,12 @@ class VCardConverter
             'BINARY'
         );
 
-        $mimeType = substr($value, 5, strpos($value, ',') - 5);
+        $mimeType = substr((string) $value, 5, strpos((string) $value, ',') - 5);
         if (strpos($mimeType, ';')) {
             $mimeType = substr($mimeType, 0, strpos($mimeType, ';'));
-            $newProperty->setValue(base64_decode(substr($value, strpos($value, ',') + 1)));
+            $newProperty->setValue(base64_decode(substr((string) $value, strpos((string) $value, ',') + 1), true));
         } else {
-            $newProperty->setValue(substr($value, strpos($value, ',') + 1));
+            $newProperty->setValue(substr((string) $value, strpos((string) $value, ',') + 1));
         }
         unset($value);
 
@@ -367,7 +368,7 @@ class VCardConverter
                 // that's now PREF=1.
                 case 'TYPE':
                     foreach ($param->getParts() as $paramPart) {
-                        if ('PREF' === strtoupper($paramPart)) {
+                        if ('PREF' === strtoupper((string) $paramPart)) {
                             $newProperty->add('PREF', '1');
                         } else {
                             $newProperty->add($param->name, $paramPart);
@@ -402,7 +403,7 @@ class VCardConverter
                 case 'ENCODING':
                     // This value only existed in vCard 2.1, and should be
                     // removed for anything else.
-                    if ('QUOTED-PRINTABLE' !== strtoupper($param->getValue())) {
+                    if ('QUOTED-PRINTABLE' !== strtoupper((string) $param->getValue())) {
                         $newProperty->add($param->name, $param->getParts());
                     }
                     break;
@@ -413,7 +414,7 @@ class VCardConverter
                      * Any other PREF numbers we'll drop.
                      */
                 case 'PREF':
-                    if ('1' == $param->getValue()) {
+                    if ('1' === (string) $param->getValue()) {
                         $newProperty->add('TYPE', 'PREF');
                     }
                     break;
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Version.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Version.php
index 893f272d3..e851a6507 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Version.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/Version.php
@@ -14,5 +14,5 @@ class Version
     /**
      * Full version number.
      */
-    public const VERSION = '4.5.2';
+    public const VERSION = '5.0.0';
 }
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/timezonedata/exchangezones.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/timezonedata/exchangezones.php
index 89bddc27c..f42944b3b 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/timezonedata/exchangezones.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/timezonedata/exchangezones.php
@@ -17,6 +17,7 @@ return [
     'Greenwich Mean Time: Dublin, Edinburgh, Lisbon, London' => 'Europe/Lisbon',
     'Greenwich Mean Time; Dublin, Edinburgh, London' => 'Europe/London',
     'Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna' => 'Europe/Berlin',
+    'Amsterdam, Berlin, Bern, Rom, Stockholm, Wien' => 'Europe/Berlin',
     'Belgrade, Pozsony, Budapest, Ljubljana, Prague' => 'Europe/Prague',
     'Brussels, Copenhagen, Madrid, Paris' => 'Europe/Paris',
     'Paris, Madrid, Brussels, Copenhagen' => 'Europe/Paris',
@@ -39,12 +40,12 @@ return [
     'Kabul' => 'Asia/Kabul',
     'Ekaterinburg' => 'Asia/Yekaterinburg',
     'Islamabad, Karachi, Tashkent' => 'Asia/Karachi',
-    'Kolkata, Chennai, Mumbai, New Delhi, India Standard Time' => 'Asia/Calcutta',
+    'Kolkata, Chennai, Mumbai, New Delhi, India Standard Time' => 'Asia/Kolkata',
     'Kathmandu, Nepal' => 'Asia/Kathmandu',
     'Almaty, Novosibirsk, North Central Asia' => 'Asia/Almaty',
     'Astana, Dhaka' => 'Asia/Dhaka',
     'Sri Jayawardenepura, Sri Lanka' => 'Asia/Colombo',
-    'Rangoon' => 'Asia/Rangoon',
+    'Rangoon' => 'Asia/Yangon',
     'Bangkok, Hanoi, Jakarta' => 'Asia/Bangkok',
     'Krasnoyarsk' => 'Asia/Krasnoyarsk',
     'Beijing, Chongqing, Hong Kong SAR, Urumqi' => 'Asia/Shanghai',
@@ -71,7 +72,7 @@ return [
     'Mid-Atlantic' => 'America/Noronha',
     'Brasilia' => 'America/Sao_Paulo', // Best guess
     'Buenos Aires' => 'America/Argentina/Buenos_Aires',
-    'Greenland' => 'America/Godthab',
+    'Greenland' => 'America/Nuuk',
     'Newfoundland' => 'America/St_Johns',
     'Atlantic Time (Canada)' => 'America/Halifax',
     'Caracas, La Paz' => 'America/Caracas',
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/timezonedata/lotuszones.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/timezonedata/lotuszones.php
index 9115ac743..45e76f7d6 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/timezonedata/lotuszones.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/timezonedata/lotuszones.php
@@ -34,7 +34,7 @@ return [
     'Newfoundland' => 'America/St_Johns',
     'Argentina' => 'America/Argentina/Buenos_Aires',
     'E. South America' => 'America/Belem',
-    'Greenland' => 'America/Godthab',
+    'Greenland' => 'America/Nuuk',
     'Montevideo' => 'America/Montevideo',
     'SA Eastern' => 'America/Belem',
     // 'Mid-Atlantic'           => 'Etc/GMT-2', // conflict with windows timezones.
@@ -71,12 +71,12 @@ return [
     'Ekaterinburg' => 'Asia/Yekaterinburg',
     'Pakistan' => 'Asia/Karachi',
     'West Asia' => 'Asia/Tashkent',
-    'India' => 'Asia/Calcutta',
+    'India' => 'Asia/Kolkata',
     'Sri Lanka' => 'Asia/Colombo',
     'Nepal' => 'Asia/Kathmandu',
     'Central Asia' => 'Asia/Dhaka',
     'N. Central Asia' => 'Asia/Almaty',
-    'Myanmar' => 'Asia/Rangoon',
+    'Myanmar' => 'Asia/Yangon',
     'North Asia' => 'Asia/Krasnoyarsk',
     'SE Asia' => 'Asia/Bangkok',
     'China' => 'Asia/Shanghai',
diff --git a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/timezonedata/windowszones.php b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/timezonedata/windowszones.php
index 335007983..2dd9120e3 100644
--- a/snappymail/v/0.0.0/app/libraries/Sabre/VObject/timezonedata/windowszones.php
+++ b/snappymail/v/0.0.0/app/libraries/Sabre/VObject/timezonedata/windowszones.php
@@ -20,7 +20,7 @@ return [
     'Arab Standard Time' => 'Asia/Riyadh',
     'Arabian Standard Time' => 'Asia/Dubai',
     'Arabic Standard Time' => 'Asia/Baghdad',
-    'Argentina Standard Time' => 'America/Buenos_Aires',
+    'Argentina Standard Time' => 'America/Argentina/Buenos_Aires',
     'Astrakhan Standard Time' => 'Europe/Astrakhan',
     'Atlantic Standard Time' => 'America/Halifax',
     'Aus Central W. Standard Time' => 'Australia/Eucla',
@@ -55,16 +55,16 @@ return [
     'Eastern Standard Time (Mexico)' => 'America/Cancun',
     'Egypt Standard Time' => 'Africa/Cairo',
     'Ekaterinburg Standard Time' => 'Asia/Yekaterinburg',
-    'FLE Standard Time' => 'Europe/Kiev',
+    'FLE Standard Time' => 'Europe/Kyiv',
     'Fiji Standard Time' => 'Pacific/Fiji',
     'GMT Standard Time' => 'Europe/London',
     'GTB Standard Time' => 'Europe/Bucharest',
     'Georgian Standard Time' => 'Asia/Tbilisi',
-    'Greenland Standard Time' => 'America/Godthab',
+    'Greenland Standard Time' => 'America/Nuuk',
     'Greenwich Standard Time' => 'Atlantic/Reykjavik',
     'Haiti Standard Time' => 'America/Port-au-Prince',
     'Hawaiian Standard Time' => 'Pacific/Honolulu',
-    'India Standard Time' => 'Asia/Calcutta',
+    'India Standard Time' => 'Asia/Kolkata',
     'Iran Standard Time' => 'Asia/Tehran',
     'Israel Standard Time' => 'Asia/Jerusalem',
     'Jordan Standard Time' => 'Asia/Amman',
@@ -82,10 +82,10 @@ return [
     'Morocco Standard Time' => 'Africa/Casablanca',
     'Mountain Standard Time' => 'America/Denver',
     'Mountain Standard Time (Mexico)' => 'America/Chihuahua',
-    'Myanmar Standard Time' => 'Asia/Rangoon',
+    'Myanmar Standard Time' => 'Asia/Yangon',
     'N. Central Asia Standard Time' => 'Asia/Novosibirsk',
     'Namibia Standard Time' => 'Africa/Windhoek',
-    'Nepal Standard Time' => 'Asia/Katmandu',
+    'Nepal Standard Time' => 'Asia/Kathmandu',
     'New Zealand Standard Time' => 'Pacific/Auckland',
     'Newfoundland Standard Time' => 'America/St_Johns',
     'Norfolk Standard Time' => 'Pacific/Norfolk',
@@ -127,7 +127,7 @@ return [
     'Transbaikal Standard Time' => 'Asia/Chita',
     'Turkey Standard Time' => 'Europe/Istanbul',
     'Turks And Caicos Standard Time' => 'America/Grand_Turk',
-    'US Eastern Standard Time' => 'America/Indianapolis',
+    'US Eastern Standard Time' => 'America/Indiana/Indianapolis',
     'US Mountain Standard Time' => 'America/Phoenix',
     'UTC' => 'Etc/GMT',
     'UTC+12' => 'Etc/GMT-12',