diff --git a/snappymail/v/0.0.0/app/libraries/MailSo/Config.php b/snappymail/v/0.0.0/app/libraries/MailSo/Config.php
index 7425c57c6..6f4a1b132 100644
--- a/snappymail/v/0.0.0/app/libraries/MailSo/Config.php
+++ b/snappymail/v/0.0.0/app/libraries/MailSo/Config.php
@@ -21,11 +21,6 @@ class Config
 	 */
 	public static $HtmlStrictAllowedTags = null;
 
-	/**
-	 * @var array|null
-	 */
-	public static $HtmlStrictAllowedAttributes = null;
-
 	/**
 	 * @var boolean
 	 */
diff --git a/snappymail/v/0.0.0/app/libraries/RainLoop/Api.php b/snappymail/v/0.0.0/app/libraries/RainLoop/Api.php
index 2d670de15..59e9da4f4 100644
--- a/snappymail/v/0.0.0/app/libraries/RainLoop/Api.php
+++ b/snappymail/v/0.0.0/app/libraries/RainLoop/Api.php
@@ -118,50 +118,6 @@ class Api
 			\MailSo\Config::$HtmlStrictDebug = !!static::Config()->Get('debug', 'enable', false);
 
 			\MailSo\Config::$CheckNewMessages = !!static::Config()->Get('labs', 'check_new_messages', true);
-
-			if (static::Config()->Get('labs', 'strict_html_parser', true))
-			{
-				\MailSo\Config::$HtmlStrictAllowedAttributes = array(
-					// defaults
-					'name',
-					'dir', 'lang', 'style', 'title',
-					'background', 'bgcolor', 'alt', 'height', 'width', 'src', 'href',
-					'border', 'bordercolor', 'charset', 'direction', 'language',
-					// a
-					'coords', 'download', 'hreflang', 'shape',
-					// body
-					'alink', 'bgproperties', 'bottommargin', 'leftmargin', 'link', 'rightmargin', 'text', 'topmargin', 'vlink',
-					'marginwidth', 'marginheight', 'offset',
-					// button,
-					'disabled', 'type', 'value',
-					// col
-					'align', 'valign',
-					// font
-					'color', 'face', 'size',
-					// form
-					'novalidate',
-					// hr
-					'noshade',
-					// img
-					'hspace', 'sizes', 'srcset', 'vspace', 'usemap',
-					// input, textarea
-					'checked', 'max', 'min', 'maxlength', 'multiple', 'pattern', 'placeholder', 'readonly', 'required', 'step', 'wrap',
-					// label
-					'for',
-					// meter
-					'low', 'high', 'optimum',
-					// ol
-					'reversed', 'start',
-					// option
-					'selected', 'label',
-					// table
-					'cols', 'rows', 'frame', 'rules', 'summary', 'cellpadding', 'cellspacing',
-					// th
-					'abbr', 'scope',
-					// td
-					'axis', 'colspan', 'rowspan', 'headers', 'nowrap'
-				);
-			}
 		}
 	}
 
diff --git a/snappymail/v/0.0.0/app/libraries/RainLoop/Config/Application.php b/snappymail/v/0.0.0/app/libraries/RainLoop/Config/Application.php
index 285500be8..e07ef695b 100644
--- a/snappymail/v/0.0.0/app/libraries/RainLoop/Config/Application.php
+++ b/snappymail/v/0.0.0/app/libraries/RainLoop/Config/Application.php
@@ -384,7 +384,6 @@ Enables caching in the system'),
 				'cookie_default_secure' => array(false),
 				'check_new_messages' => array(true),
 				'replace_env_in_configuration' => array(''),
-				'strict_html_parser' => array(false),
 				'boundary_prefix' => array(''),
 				'kolab_enabled' => array(false),
 				'dev_email' => array(''),