diff --git a/background.js b/background.js
index 0274d07..2e868c8 100644
--- a/background.js
+++ b/background.js
@@ -16,6 +16,8 @@ async function executeErledigtAction(tab, actionConfig) {
   const storage = await browser.storage.local.get(['gitea_config', 'schlagwoerter_cache']);
   const config = storage.gitea_config || {};
   const schlagwoerter = storage.schlagwoerter_cache;
+  // "Als gelesen markieren" — pro Aktion konfigurierbar, standardmäßig an.
+  const markRead = (actionConfig || {}).markRead !== false;
 
   // Apply user's tag
   let tagKey = null;
@@ -33,6 +35,11 @@ async function executeErledigtAction(tab, actionConfig) {
     }
   }
 
+  // Mark as read (before the move, while the id is still valid in this folder)
+  if (markRead && !message.read) {
+    await messenger.messages.update(message.id, { read: true });
+  }
+
   // Move to target folder
   if (actionConfig.targetFolder) {
     const folderInfo = JSON.parse(actionConfig.targetFolder);
@@ -42,6 +49,7 @@ async function executeErledigtAction(tab, actionConfig) {
   // Feedback
   const parts = [];
   if (tagKey) parts.push('markiert');
+  if (markRead && !message.read) parts.push('gelesen');
   if (actionConfig.targetFolder) parts.push('verschoben');
   const title = actionConfig.name || 'Erledigt';
   browser.notifications.create({
@@ -68,12 +76,19 @@ messenger.messageDisplayAction.onClicked.addListener(async (tab) => {
 async function updateErledigtPopup() {
   const result = await browser.storage.local.get('erledigt_config');
   const actions = (result.erledigt_config || {}).actions || [];
+  const setLabel = (label) => {
+    // setLabel ist Thunderbird-spezifisch — defensiv prüfen, damit der Start nie bricht.
+    if (messenger.messageDisplayAction.setLabel) return messenger.messageDisplayAction.setLabel({ label });
+  };
   if (actions.length > 1) {
     await messenger.messageDisplayAction.setPopup({ popup: 'message_popup.html' });
     await messenger.messageDisplayAction.setTitle({ title: 'Aktion wählen' });
+    await setLabel('QuickMove');
   } else {
+    const name = actions[0]?.name || 'QuickMove';
     await messenger.messageDisplayAction.setPopup({ popup: '' });
-    await messenger.messageDisplayAction.setTitle({ title: actions[0]?.name || 'Erledigt' });
+    await messenger.messageDisplayAction.setTitle({ title: name });
+    await setLabel(name); // Button heißt wie die (einzige) Aktion
   }
 }
 
diff --git a/manifest.json b/manifest.json
index 16147af..7ab97d6 100644
--- a/manifest.json
+++ b/manifest.json
@@ -1,7 +1,7 @@
 {
   "manifest_version": 2,
   "name": "HPS Vorlagen & Signaturen",
-  "version": "2.3.3",
+  "version": "2.3.4",
   "description": "Vorlagen- und Signaturverwaltung für Hotel Park Soltau mit Git-Sync",
   "browser_specific_settings": {
     "gecko": {
diff --git a/templates-reply-hotel.xpi b/templates-reply-hotel.xpi
index 20b23eb..2b7b008 100644
Binary files a/templates-reply-hotel.xpi and b/templates-reply-hotel.xpi differ
diff --git a/templates_options/templates_options.js b/templates_options/templates_options.js
index 19349d2..b5d73cd 100644
--- a/templates_options/templates_options.js
+++ b/templates_options/templates_options.js
@@ -1879,6 +1879,12 @@ function renderErledigtAction(action, index) {
                 ${erledigtFolderOptions}
             </select>
         </div>
+        <div class="form-group" style="flex:0 0 auto;">
+            ${index === 0 ? '<label>Gelesen</label>' : ''}
+            <label style="display:flex;align-items:center;gap:6px;height:34px;white-space:nowrap;font-size:13px;cursor:pointer;">
+                <input type="checkbox" class="erledigt-markread" ${action.markRead !== false ? 'checked' : ''}> als gelesen
+            </label>
+        </div>
         <button type="button" class="btn btn-danger btn-sm erledigt-remove" title="Entfernen" style="margin-bottom:2px;">✕</button>
     `;
     if (action.targetFolder) {
@@ -1900,10 +1906,11 @@ function getErledigtActionsFromForm() {
     const actions = [];
     const names = document.querySelectorAll('.erledigt-name');
     const folders = document.querySelectorAll('.erledigt-folder');
+    const reads = document.querySelectorAll('.erledigt-markread');
     for (let i = 0; i < names.length; i++) {
         const name = names[i].value.trim();
         if (!name) continue;
-        actions.push({ name, targetFolder: folders[i].value || '' });
+        actions.push({ name, targetFolder: folders[i].value || '', markRead: reads[i] ? reads[i].checked : true });
     }
     return actions;
 }
diff --git a/updates.json b/updates.json
index 7d4394a..7c55d5e 100644
--- a/updates.json
+++ b/updates.json
@@ -2,6 +2,16 @@
   "addons": {
     "it@hotel-park-soltau.de": {
       "updates": [
+        {
+          "version": "2.3.4",
+          "update_link": "https://git.hotel-park-soltau.de/hps/hps-thunderbird-templates/releases/download/v2.3.4/templates-reply-hotel.xpi",
+          "update_hash": "sha256:1825f81c309c7d2be4bba048b1e41d0758bb145823b765c0dbb8add75cd4ad2e",
+          "applications": {
+            "gecko": {
+              "strict_min_version": "109.0"
+            }
+          }
+        },
         {
           "version": "2.3.3",
           "update_link": "https://git.hotel-park-soltau.de/hps/hps-thunderbird-templates/releases/download/v2.3.3/templates-reply-hotel.xpi",