diff --git a/composer.json b/composer.json
index 96029ebdee..bbdd9d0134 100644
--- a/composer.json
+++ b/composer.json
@@ -56,6 +56,7 @@
         "npm-asset/socket.io-client": "^2.0",
         "npm-asset/swiped-events": "^1.0.9",
         "npm-asset/timeago": "^1.6.3",
+        "npm-asset/unicode-emoji-json": "^0.5.0",
         "phpoffice/phpspreadsheet": "^2.0",
         "raoul2000/yii2-jcrop-widget": "^1.0",
         "symfony/amazon-mailer": "^5.4",
diff --git a/composer.lock b/composer.lock
index f8a4edfdb3..200a697cef 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "1999d0a4f117ac2c69cf9743553d7b08",
+    "content-hash": "54bec7841b0d448a8ad955ef8ff41b07",
     "packages": [
         {
             "name": "async-aws/core",
@@ -4115,6 +4115,18 @@
             },
             "type": "npm-asset"
         },
+        {
+            "name": "npm-asset/unicode-emoji-json",
+            "version": "0.5.0",
+            "dist": {
+                "type": "tar",
+                "url": "https://registry.npmjs.org/unicode-emoji-json/-/unicode-emoji-json-0.5.0.tgz"
+            },
+            "type": "npm-asset",
+            "license": [
+                "MIT"
+            ]
+        },
         {
             "name": "npm-asset/ws",
             "version": "7.4.6",
diff --git a/protected/humhub/modules/content/helpers/EmojiHelper.php b/protected/humhub/modules/content/helpers/EmojiHelper.php
new file mode 100644
index 0000000000..cfe5cb42f8
--- /dev/null
+++ b/protected/humhub/modules/content/helpers/EmojiHelper.php
@@ -0,0 +1,50 @@
+<?php
+/**
+ * @link https://www.humhub.org/
+ * @copyright Copyright (c) HumHub GmbH & Co. KG
+ * @license https://www.humhub.com/licences
+ */
+
+namespace humhub\modules\content\helpers;
+
+use Yii;
+
+/**
+ * @since 1.16
+ */
+class EmojiHelper
+{
+    public const DATA_PATH = '@npm/unicode-emoji-json/data-by-emoji.json';
+
+    public static function getData(): array
+    {
+        return Yii::$app->runtimeCache->getOrSet('emoji-helper-data', function () {
+            $dataPath = Yii::getAlias(self::DATA_PATH);
+
+            if (!is_file($dataPath)) {
+                return [];
+            }
+
+            $data = (array) json_decode(file_get_contents($dataPath));
+
+            $emojis = [];
+            foreach ($data as $e => $emoji) {
+                $emojis[$emoji->name] = $e;
+            }
+
+            return $emojis;
+        });
+    }
+
+    public static function getUnicode(string $name): ?string
+    {
+        return self::getData()[$name] ?? null;
+    }
+
+    public static function findEmoji(string $content): ?string
+    {
+        return preg_match('/:([a-z\d\-\+][a-z\d\-\+\s_]*):/i', $content, $matches)
+            ? $matches[1]
+            : null;
+    }
+}
diff --git a/protected/humhub/modules/content/widgets/richtext/converter/RichTextToEmailHtmlConverter.php b/protected/humhub/modules/content/widgets/richtext/converter/RichTextToEmailHtmlConverter.php
index 1b663932f4..8f4c7ffaa4 100644
--- a/protected/humhub/modules/content/widgets/richtext/converter/RichTextToEmailHtmlConverter.php
+++ b/protected/humhub/modules/content/widgets/richtext/converter/RichTextToEmailHtmlConverter.php
@@ -3,6 +3,7 @@
 namespace humhub\modules\content\widgets\richtext\converter;
 
 use humhub\libs\Html;
+use humhub\modules\content\helpers\EmojiHelper;
 use humhub\modules\content\widgets\richtext\extensions\link\LinkParserBlock;
 use humhub\modules\file\actions\DownloadAction;
 use humhub\modules\file\models\File;
@@ -123,4 +124,20 @@ class RichTextToEmailHtmlConverter extends RichTextToHtmlConverter
     {
         return '<p>' . nl2br($this->renderAbsy($block['content'])) . "</p>\n";
     }
+
+    /**
+     * @marker :
+     */
+    protected function parseEmoji($markdown)
+    {
+        return ($emoji = EmojiHelper::findEmoji($markdown))
+            ? [['emoji', [['text', $emoji]]], strlen($emoji) + 2]
+            : [['text', ':'], 1];
+    }
+
+    protected function renderEmoji($element)
+    {
+        $emojiName = $this->renderAbsy($element[1]);
+        return EmojiHelper::getUnicode($emojiName) ?? ':' . $emojiName . ':';
+    }
 }
diff --git a/protected/humhub/modules/content/widgets/richtext/converter/RichTextToPlainTextConverter.php b/protected/humhub/modules/content/widgets/richtext/converter/RichTextToPlainTextConverter.php
index b38fcb80d9..5627cd8fce 100644
--- a/protected/humhub/modules/content/widgets/richtext/converter/RichTextToPlainTextConverter.php
+++ b/protected/humhub/modules/content/widgets/richtext/converter/RichTextToPlainTextConverter.php
@@ -3,6 +3,7 @@
 namespace humhub\modules\content\widgets\richtext\converter;
 
 use humhub\libs\Helpers;
+use humhub\modules\content\helpers\EmojiHelper;
 use humhub\modules\content\widgets\richtext\extensions\link\LinkParserBlock;
 use humhub\modules\content\widgets\richtext\extensions\link\RichTextLinkExtension;
 use humhub\modules\content\widgets\richtext\ProsemirrorRichText;
@@ -187,4 +188,20 @@ class RichTextToPlainTextConverter extends RichTextToMarkdownConverter
 
         return $result;
     }
+
+    /**
+     * @marker :
+     */
+    protected function parseEmoji($markdown)
+    {
+        return ($emoji = EmojiHelper::findEmoji($markdown))
+            ? [['emoji', [['text', $emoji]]], strlen($emoji) + 2]
+            : [['text', ':'], 1];
+    }
+
+    protected function renderEmoji($element)
+    {
+        $emojiName = $this->renderAbsy($element[1]);
+        return EmojiHelper::getUnicode($emojiName) ?? ':' . $emojiName . ':';
+    }
 }
diff --git a/protected/humhub/modules/notification/targets/MailTarget.php b/protected/humhub/modules/notification/targets/MailTarget.php
index e9c0827fa7..6e1401b224 100644
--- a/protected/humhub/modules/notification/targets/MailTarget.php
+++ b/protected/humhub/modules/notification/targets/MailTarget.php
@@ -8,9 +8,10 @@
 
 namespace humhub\modules\notification\targets;
 
-use Yii;
+use humhub\modules\content\widgets\richtext\converter\RichTextToPlainTextConverter;
 use humhub\modules\notification\components\BaseNotification;
 use humhub\modules\user\models\User;
+use Yii;
 use yii\helpers\ArrayHelper;
 use yii\helpers\Url;
 
@@ -70,7 +71,7 @@ class MailTarget extends BaseTarget
 
         $mail = Yii::$app->mailer->compose($this->view, $viewParams)
             ->setTo($recipient->email)
-            ->setSubject(str_replace("\n", " ", trim($notification->getMailSubject())));
+            ->setSubject(RichTextToPlainTextConverter::process($notification->getMailSubject()));
         if ($replyTo = Yii::$app->settings->get('mailer.systemEmailReplyTo')) {
             $mail->setReplyTo($replyTo);
         }