diff --git a/dev/Model/FolderCollection.js b/dev/Model/FolderCollection.js
index e9c86ed47..7b7650f1b 100644
--- a/dev/Model/FolderCollection.js
+++ b/dev/Model/FolderCollection.js
@@ -227,8 +227,6 @@ export class FolderCollectionModel extends AbstractCollectionModel
 										name: name,
 										fullName: parentName,
 										delimiter: delimiter,
-										exists: false,
-										isSubscribed: false,
 										flags: ['\\nonexistent']
 									});
 									setFolder(pfolder);
@@ -380,6 +378,8 @@ export class FolderModel extends AbstractModel {
 			isFlagged: () => FolderUserStore.currentFolder() === this
 				&& MessagelistUserStore.listSearch().includes('flagged'),
 
+//			isSubscribed: () => this.flags().includes('\\subscribed'),
+
 			hasVisibleSubfolders: () => !!this.subFolders().find(folder => folder.visible()),
 
 			hasSubscriptions: () => this.isSubscribed() | !!this.subFolders().find(
@@ -535,6 +535,10 @@ export class FolderModel extends AbstractModel {
 			path.pop();
 			folder.parentName = path.join(folder.delimiter);
 
+			folder.isSubscribed(folder.flags.includes('\\subscribed'));
+			folder.exists = !folder.flags.includes('\\nonexistent');
+			folder.selectable(folder.exists && !folder.flags.includes('\\noselect'));
+
 			type && 'mail' != type && folder.kolabType(type);
 		}
 		return folder;
diff --git a/dev/Styles/User/MessageView.less b/dev/Styles/User/MessageView.less
index b9807ff13..8aca8ee33 100644
--- a/dev/Styles/User/MessageView.less
+++ b/dev/Styles/User/MessageView.less
@@ -476,6 +476,9 @@ html.sm-msgView-bottom {
 	}
 }
 
+/*
+@media all and (display-mode: fullscreen) {
+*/
 html.rl-fullscreen {
 
 	#rl-left,
diff --git a/snappymail/v/0.0.0/app/libraries/MailSo/Base/Collection.php b/snappymail/v/0.0.0/app/libraries/MailSo/Base/Collection.php
index 0605b89cc..634c5a3c7 100644
--- a/snappymail/v/0.0.0/app/libraries/MailSo/Base/Collection.php
+++ b/snappymail/v/0.0.0/app/libraries/MailSo/Base/Collection.php
@@ -39,6 +39,11 @@ abstract class Collection extends \ArrayObject implements \JsonSerializable
 		}
 	}
 
+	public function keys() : array
+	{
+		return \array_keys($this->getArrayCopy());
+	}
+
 	public function Add($mItem, bool $bToTop = false) : self
 	{
 		$this->append($mItem, $bToTop);
diff --git a/snappymail/v/0.0.0/app/libraries/MailSo/Imap/Commands/Folders.php b/snappymail/v/0.0.0/app/libraries/MailSo/Imap/Commands/Folders.php
index 16b213803..1ac4e35e4 100644
--- a/snappymail/v/0.0.0/app/libraries/MailSo/Imap/Commands/Folders.php
+++ b/snappymail/v/0.0.0/app/libraries/MailSo/Imap/Commands/Folders.php
@@ -13,6 +13,7 @@
 namespace MailSo\Imap\Commands;
 
 use MailSo\Imap\Folder;
+use MailSo\Imap\FolderCollection;
 use MailSo\Imap\FolderInformation;
 use MailSo\Imap\SequenceSet;
 use MailSo\Imap\Enumerations\FolderStatus;
@@ -171,7 +172,7 @@ trait Folders
 		$oFolderInfo = $this->oCurrentFolderInfo;
 		$bReselect = false;
 		$bWritable = false;
-		if ($oFolderInfo && $sFolderName === $oFolderInfo->FolderName) {
+		if ($oFolderInfo && $sFolderName === $oFolderInfo->FullName) {
 			if ($oFolderInfo->hasStatus) {
 				return $oFolderInfo;
 			}
@@ -351,7 +352,7 @@ trait Folders
 	{
 		if (!$bForceReselect
 		  && $this->oCurrentFolderInfo
-		  && $sFolderName === $this->oCurrentFolderInfo->FolderName
+		  && $sFolderName === $this->oCurrentFolderInfo->FullName
 		  && ($bIsWritable === $this->oCurrentFolderInfo->IsWritable || $this->oCurrentFolderInfo->IsWritable)
 		) {
 			return $this->oCurrentFolderInfo;
@@ -444,7 +445,7 @@ trait Folders
 	 * @throws \MailSo\Net\Exceptions\*
 	 * @throws \MailSo\Imap\Exceptions\*
 	 */
-	public function FolderList(string $sParentFolderName, string $sListPattern, bool $bIsSubscribeList = false, bool $bUseListStatus = false) : array
+	public function FolderList(string $sParentFolderName, string $sListPattern, bool $bIsSubscribeList = false, bool $bUseListStatus = false) : FolderCollection
 	{
 		$sCmd = 'LIST';
 
@@ -504,16 +505,17 @@ trait Folders
 		$aMetadata = $bMetadata ? $this->getAllMetadata() : null;
 
 		$this->SendRequest($sCmd, $aParameters);
-		$aReturn = array();
+		$aFolders = array();
+		$oFolderCollection = new FolderCollection;
 		$sDelimiter = '';
 		$bInbox = false;
 		foreach ($this->yieldUntaggedResponses() as $oResponse) {
 			if ('STATUS' === $oResponse->StatusOrIndex && isset($oResponse->ResponseList[2])) {
 				$sFullName = $this->toUTF8($oResponse->ResponseList[2]);
-				if (!isset($aReturn[$sFullName])) {
-					$aReturn[$sFullName] = new Folder($sFullName);
+				if (!isset($oFolderCollection[$sFullName])) {
+					$oFolderCollection[$sFullName] = new Folder($sFullName);
 				}
-				$aReturn[$sFullName]->setStatusFromResponse($oResponse);
+				$oFolderCollection[$sFullName]->setStatusFromResponse($oResponse);
 			}
 			else if ($sCmd === $oResponse->StatusOrIndex && 5 === \count($oResponse->ResponseList)) {
 				try
@@ -527,18 +529,16 @@ trait Folders
 					 * $oResponse->ResponseList[3] = Delimiter
 					 * $oResponse->ResponseList[4] = FullName
 					 */
-					if (isset($aReturn[$sFullName])) {
-						$oFolder = $aReturn[$sFullName];
+					if (isset($oFolderCollection[$sFullName])) {
+						$oFolder = $oFolderCollection[$sFullName];
 						$oFolder->setDelimiter($oResponse->ResponseList[3]);
 						$oFolder->setFlags($oResponse->ResponseList[2]);
 					} else {
 						$oFolder = new Folder($sFullName, $oResponse->ResponseList[3], $oResponse->ResponseList[2]);
-						$aReturn[$sFullName] = $oFolder;
+						$oFolderCollection[$sFullName] = $oFolder;
 					}
 
-					if ($oFolder->IsInbox()) {
-						$bInbox = true;
-					}
+					$bInbox = $bInbox || $oFolder->IsInbox();
 
 					if (!$sDelimiter) {
 						$sDelimiter = $oFolder->Delimiter();
@@ -547,8 +547,6 @@ trait Folders
 					if (isset($aMetadata[$oResponse->ResponseList[4]])) {
 						$oFolder->SetAllMetadata($aMetadata[$oResponse->ResponseList[4]]);
 					}
-
-					$aReturn[$sFullName] = $oFolder;
 				}
 				catch (\Throwable $oException)
 				{
@@ -557,13 +555,16 @@ trait Folders
 			}
 		}
 
+//		$iOptimizationLimit = $this->Settings->folder_list_limit;
+//		$oFolderCollection->Optimized = 10 < $iOptimizationLimit && $oFolderCollection->count() > $iOptimizationLimit;
+
 		// RFC 5464
-		if ($bMetadata && !$aMetadata /*&& 50 < \count($aReturn)*/) {
-			foreach ($aReturn as $oFolder) {
-//				if (2 > \substr_count($oFolder->FullName(), $oFolder->Delimiter()))
+		if ($bMetadata && !$aMetadata /*&& 50 < $oFolderCollection->count()*/) {
+			foreach ($oFolderCollection as $oFolder) {
+//				if (2 > \substr_count($oFolder->FullName, $oFolder->Delimiter()))
 				try {
 					$oFolder->SetAllMetadata(
-						$this->getMetadata($oFolder->FullName(), ['/shared', '/private'], ['DEPTH'=>'infinity'])
+						$this->getMetadata($oFolder->FullName, ['/shared', '/private'], ['DEPTH'=>'infinity'])
 					);
 				} catch (\Throwable $oException) {
 					// Ignore error
@@ -571,11 +572,11 @@ trait Folders
 			}
 		}
 
-		if (!$bInbox && !$sParentFolderName && !isset($aReturn['INBOX'])) {
-			$aReturn['INBOX'] = new Folder('INBOX', $sDelimiter);
+		if (!$bInbox && !$sParentFolderName && !isset($oFolderCollection['INBOX'])) {
+			$oFolderCollection['INBOX'] = new Folder('INBOX', $sDelimiter);
 		}
 
-		return $aReturn;
+		return $oFolderCollection;
 	}
 
 	/**
@@ -583,7 +584,7 @@ trait Folders
 	 * @throws \MailSo\Net\Exceptions\*
 	 * @throws \MailSo\Imap\Exceptions\*
 	 */
-	public function FolderSubscribeList(string $sParentFolderName, string $sListPattern) : array
+	public function FolderSubscribeList(string $sParentFolderName, string $sListPattern) : FolderCollection
 	{
 		return $this->FolderList($sParentFolderName, $sListPattern, true);
 	}
@@ -593,7 +594,7 @@ trait Folders
 	 * @throws \MailSo\Net\Exceptions\*
 	 * @throws \MailSo\Imap\Exceptions\*
 	 */
-	public function FolderStatusList(string $sParentFolderName, string $sListPattern) : array
+	public function FolderStatusList(string $sParentFolderName, string $sListPattern) : FolderCollection
 	{
 		return $this->FolderList($sParentFolderName, $sListPattern, false, true);
 	}
diff --git a/snappymail/v/0.0.0/app/libraries/MailSo/Imap/Folder.php b/snappymail/v/0.0.0/app/libraries/MailSo/Imap/Folder.php
index 9037f36ae..4030938aa 100644
--- a/snappymail/v/0.0.0/app/libraries/MailSo/Imap/Folder.php
+++ b/snappymail/v/0.0.0/app/libraries/MailSo/Imap/Folder.php
@@ -39,7 +39,7 @@ class Folder implements \JsonSerializable
 		if (!\strlen($sFullName)) {
 			throw new \InvalidArgumentException;
 		}
-		$this->FolderName = $sFullName;
+		$this->FullName = $sFullName;
 		$this->setDelimiter($sDelimiter);
 		$this->setFlags($aFlags);
 /*
@@ -68,7 +68,7 @@ class Folder implements \JsonSerializable
 
 	public function Name() : string
 	{
-		$sNameRaw = $this->FolderName;
+		$sNameRaw = $this->FullName;
 		if ($this->sDelimiter) {
 			$aNames = \explode($this->sDelimiter, $sNameRaw);
 			return \end($aNames);
@@ -76,11 +76,6 @@ class Folder implements \JsonSerializable
 		return $sNameRaw;
 	}
 
-	public function FullName() : string
-	{
-		return $this->FolderName;
-	}
-
 	public function Delimiter() : ?string
 	{
 		return $this->sDelimiter;
@@ -91,14 +86,10 @@ class Folder implements \JsonSerializable
 		return $this->aFlagsLowerCase;
 	}
 
-	public function Exists() : bool
-	{
-		return !\in_array('\\nonexistent', $this->aFlagsLowerCase);
-	}
-
 	public function Selectable() : bool
 	{
-		return !\in_array('\\noselect', $this->aFlagsLowerCase) && $this->Exists();
+		return !\in_array('\\noselect', $this->aFlagsLowerCase)
+			&& !\in_array('\\nonexistent', $this->aFlagsLowerCase);
 	}
 
 	public function IsSubscribed() : bool
@@ -108,7 +99,7 @@ class Folder implements \JsonSerializable
 
 	public function IsInbox() : bool
 	{
-		return 'INBOX' === \strtoupper($this->FolderName) || \in_array('\\inbox', $this->aFlagsLowerCase);
+		return 'INBOX' === \strtoupper($this->FullName) || \in_array('\\inbox', $this->aFlagsLowerCase);
 	}
 
 	public function SetMetadata(string $sName, string $sData) : void
@@ -150,7 +141,7 @@ class Folder implements \JsonSerializable
 			if ($match) {
 				$role = \array_shift($match);
 			}
-			if (!$role && 'INBOX' === \strtoupper($this->FolderName)) {
+			if (!$role && 'INBOX' === \strtoupper($this->FullName)) {
 				return 'inbox';
 			}
 		}
@@ -179,17 +170,14 @@ class Folder implements \JsonSerializable
 /*
 		if ($this->ImapClient->hasCapability('ACL') || $this->ImapClient->CapabilityValue('RIGHTS')) {
 			// MailSo\Imap\Responses\ACL
-			$rights = $this->ImapClient->FolderMyRights($this->FolderName);
+			$rights = $this->ImapClient->FolderMyRights($this->FullName);
 		}
 */
 		return array(
 			'@Object' => 'Object/Folder',
 			'name' => $this->Name(),
-			'fullName' => $this->FolderName,
+			'fullName' => $this->FullName,
 			'delimiter' => (string) $this->sDelimiter,
-			'isSubscribed' => $this->IsSubscribed(),
-			'exists' => $this->Exists(),
-			'selectable' => $this->Selectable(),
 			'flags' => $this->aFlagsLowerCase,
 //			'extended' => $aExtended,
 //			'permanentFlags' => $this->PermanentFlags,
diff --git a/snappymail/v/0.0.0/app/libraries/MailSo/Mail/FolderCollection.php b/snappymail/v/0.0.0/app/libraries/MailSo/Imap/FolderCollection.php
similarity index 70%
rename from snappymail/v/0.0.0/app/libraries/MailSo/Mail/FolderCollection.php
rename to snappymail/v/0.0.0/app/libraries/MailSo/Imap/FolderCollection.php
index 9c6265997..8e2d9d8c2 100644
--- a/snappymail/v/0.0.0/app/libraries/MailSo/Mail/FolderCollection.php
+++ b/snappymail/v/0.0.0/app/libraries/MailSo/Imap/FolderCollection.php
@@ -9,7 +9,7 @@
  * file that was distributed with this source code.
  */
 
-namespace MailSo\Mail;
+namespace MailSo\Imap;
 
 /**
  * @category MailSo
@@ -21,22 +21,16 @@ class FolderCollection extends \MailSo\Base\Collection
 
 	public function append($oFolder, bool $bToTop = false) : void
 	{
-		assert($oFolder instanceof \MailSo\Imap\Folder);
+		assert($oFolder instanceof Folder);
 		parent::append($oFolder, $bToTop);
 	}
 
-	public function FindDelimiter() : string
-	{
-		$oFolder = $this['INBOX'] ?? $this[0] ?? null;
-		return $oFolder ? $oFolder->Delimiter() : '/';
-	}
-
 	#[\ReturnTypeWillChange]
 	public function jsonSerialize()
 	{
 		return array(
 			'@Object' => 'Collection/FolderCollection',
-			'@Collection' => $this->getArrayCopy(),
+			'@Collection' => \array_values($this->getArrayCopy()),
 //			'optimized' => $this->Optimized
 		);
 	}
diff --git a/snappymail/v/0.0.0/app/libraries/MailSo/Imap/FolderInformation.php b/snappymail/v/0.0.0/app/libraries/MailSo/Imap/FolderInformation.php
index db1f902cc..5104487df 100644
--- a/snappymail/v/0.0.0/app/libraries/MailSo/Imap/FolderInformation.php
+++ b/snappymail/v/0.0.0/app/libraries/MailSo/Imap/FolderInformation.php
@@ -33,9 +33,9 @@ class FolderInformation implements \JsonSerializable
 	 */
 	public array $PermanentFlags = array();
 
-	function __construct(string $sFolderName, bool $bIsWritable)
+	function __construct(string $sFullName, bool $bIsWritable)
 	{
-		$this->FolderName = $sFolderName;
+		$this->FullName = $sFullName;
 		$this->IsWritable = $bIsWritable;
 	}
 
@@ -56,7 +56,7 @@ class FolderInformation implements \JsonSerializable
 	{
 		$result = array(
 			'id' => $this->MAILBOXID,
-			'name' => $this->FolderName,
+			'name' => $this->FullName,
 			'flags' => $this->Flags,
 			'permanentFlags' => $this->PermanentFlags,
 			'uidNext' => $this->UIDNEXT,
diff --git a/snappymail/v/0.0.0/app/libraries/MailSo/Imap/Traits/Status.php b/snappymail/v/0.0.0/app/libraries/MailSo/Imap/Traits/Status.php
index d595d148e..1f909f3fb 100644
--- a/snappymail/v/0.0.0/app/libraries/MailSo/Imap/Traits/Status.php
+++ b/snappymail/v/0.0.0/app/libraries/MailSo/Imap/Traits/Status.php
@@ -22,7 +22,7 @@ namespace MailSo\Imap\Traits;
  */
 trait Status
 {
-	public string $FolderName;
+	public string $FullName;
 
 	public bool $hasStatus = false;
 
@@ -102,7 +102,7 @@ trait Status
 			return null;
 		}
 		return \md5('FolderHash/'. \implode('-', [
-				$this->FolderName,
+				$this->FullName,
 				$this->MESSAGES,
 				$this->UIDNEXT,
 				$this->UIDVALIDITY,
diff --git a/snappymail/v/0.0.0/app/libraries/MailSo/Mail/MailClient.php b/snappymail/v/0.0.0/app/libraries/MailSo/Mail/MailClient.php
index 43ea10797..964c926ef 100644
--- a/snappymail/v/0.0.0/app/libraries/MailSo/Mail/MailClient.php
+++ b/snappymail/v/0.0.0/app/libraries/MailSo/Mail/MailClient.php
@@ -11,6 +11,7 @@
 
 namespace MailSo\Mail;
 
+use MailSo\Imap\FolderCollection;
 use MailSo\Imap\FolderInformation;
 use MailSo\Imap\Enumerations\FetchType;
 use MailSo\Imap\Enumerations\MessageFlag;
@@ -794,45 +795,32 @@ class MailClient
 
 	public function Folders(string $sParent, string $sListPattern, bool $bUseListSubscribeStatus) : ?FolderCollection
 	{
-		$aImapSubscribedFoldersHelper = null;
-		if ($this->oImapClient->hasCapability('LIST-EXTENDED')) {
-			$bUseListSubscribeStatus = false;
-		} else if ($bUseListSubscribeStatus) {
+//		$this->oImapClient->Settings->disable_list_status
+		$oFolderCollection = $this->oImapClient->FolderStatusList($sParent, $sListPattern);
+		if (!$oFolderCollection->count()) {
+			return null;
+		}
+
+		if ($bUseListSubscribeStatus && !$this->oImapClient->hasCapability('LIST-EXTENDED')) {
 //			$this->oLogger && $this->oLogger->Write('RFC5258 not supported, using LSUB');
 //			\SnappyMail\Log::warning('IMAP', 'RFC5258 not supported, using LSUB');
 			try
 			{
-				$aSubscribedFolders = $this->oImapClient->FolderSubscribeList($sParent, $sListPattern);
-				$aImapSubscribedFoldersHelper = array();
-				foreach ($aSubscribedFolders as /* @var $oImapFolder \MailSo\Imap\Folder */ $oImapFolder) {
-					$aImapSubscribedFoldersHelper[] = $oImapFolder->FullName();
+				$oSubscribedFolders = $this->oImapClient->FolderSubscribeList($sParent, $sListPattern);
+				foreach ($oSubscribedFolders as /* @var $oImapFolder \MailSo\Imap\Folder */ $oImapFolder) {
+					isset($oFolderCollection[$oImapFolder->FullName])
+					&& $oFolderCollection[$oImapFolder->FullName]->setSubscribed();
 				}
 			}
 			catch (\Throwable $oException)
 			{
 				\SnappyMail\Log::error('IMAP', 'FolderSubscribeList: ' . $oException->getMessage());
-			}
-		}
-
-//		$this->oImapClient->Settings->disable_list_status
-		$aFolders = $this->oImapClient->FolderStatusList($sParent, $sListPattern);
-		if (!$aFolders) {
-			return null;
-		}
-
-		if ($bUseListSubscribeStatus) {
-			foreach ($aFolders as $sFullName => /* @var $oImapFolder \MailSo\Imap\Folder */ $oImapFolder) {
-				if (null === $aImapSubscribedFoldersHelper || \in_array($sFullName, $aImapSubscribedFoldersHelper)) {
+				foreach ($oFolderCollection as /* @var $oImapFolder \MailSo\Imap\Folder */ $oImapFolder) {
 					$oImapFolder->setSubscribed();
 				}
 			}
 		}
 
-		$oFolderCollection = new FolderCollection;
-//		$iOptimizationLimit = $this->oImapClient->Settings->folder_list_limit;
-//		$oFolderCollection->Optimized = 10 < $iOptimizationLimit && \count($aFolders) > $iOptimizationLimit;
-		$oFolderCollection->exchangeArray(\array_values($aFolders));
-
 		return $oFolderCollection;
 	}
 
@@ -930,23 +918,22 @@ class MailClient
 			throw new \InvalidArgumentException;
 		}
 
-		$aSubscribeFolders = array();
+		$oSubscribedFolders = array();
 		if ($bSubscribe) {
-			$aSubscribeFolders = $this->oImapClient->FolderSubscribeList($sPrevFolderFullName, '*');
-			foreach ($aSubscribeFolders as /* @var $oFolder \MailSo\Imap\Folder */ $oFolder) {
-				$this->oImapClient->FolderUnsubscribe($oFolder->FullName());
+			$oSubscribedFolders = $this->oImapClient->FolderSubscribeList($sPrevFolderFullName, '*');
+			foreach ($oSubscribedFolders as /* @var $oFolder \MailSo\Imap\Folder */ $oFolder) {
+				$this->oImapClient->FolderUnsubscribe($oFolder->FullName);
 			}
 		}
 
 		$this->oImapClient->FolderRename($sPrevFolderFullName, $sNewFolderFullName);
 
-		foreach ($aSubscribeFolders as /* @var $oFolder \MailSo\Imap\Folder */ $oFolder) {
-			$sFolderFullNameForResubscribe = $oFolder->FullName();
+		foreach ($oSubscribedFolders as /* @var $oFolder \MailSo\Imap\Folder */ $oFolder) {
+			$sFolderFullNameForResubscribe = $oFolder->FullName;
 			if (\str_starts_with($sFolderFullNameForResubscribe, $sPrevFolderFullName)) {
-				$sNewFolderFullNameForResubscribe = $sNewFolderFullName.
-					\substr($sFolderFullNameForResubscribe, \strlen($sPrevFolderFullName));
-
-				$this->oImapClient->FolderSubscribe($sNewFolderFullNameForResubscribe);
+				$this->oImapClient->FolderSubscribe(
+					$sNewFolderFullName . \substr($sFolderFullNameForResubscribe, \strlen($sPrevFolderFullName))
+				);
 			}
 		}
 
diff --git a/snappymail/v/0.0.0/app/libraries/RainLoop/Actions/Response.php b/snappymail/v/0.0.0/app/libraries/RainLoop/Actions/Response.php
index bc1e41497..9590565dd 100644
--- a/snappymail/v/0.0.0/app/libraries/RainLoop/Actions/Response.php
+++ b/snappymail/v/0.0.0/app/libraries/RainLoop/Actions/Response.php
@@ -204,7 +204,7 @@ trait Response
 				);
 				$this->aCheckableFolder = \is_array($aCheckable) ? $aCheckable : array();
 			}
-			$aResult['checkable'] = \in_array($mResponse->FullName(), $this->aCheckableFolder);
+			$aResult['checkable'] = \in_array($mResponse->FullName, $this->aCheckableFolder);
 
 			return $aResult;
 		}
@@ -216,7 +216,7 @@ trait Response
 				return \array_slice($mResult['@Collection'], 0, 100);
 			}
 			if ($mResponse instanceof \MailSo\Mail\AttachmentCollection
-			 || $mResponse instanceof \MailSo\Mail\FolderCollection
+			 || $mResponse instanceof \MailSo\Imap\FolderCollection
 			 || $mResponse instanceof \MailSo\Mail\MessageCollection
 			) {
 				return $mResult;