diff --git a/app/src/main/java/eu/faircode/email/FragmentMessages.java b/app/src/main/java/eu/faircode/email/FragmentMessages.java
index 82294e8ac1..d0c0180402 100644
--- a/app/src/main/java/eu/faircode/email/FragmentMessages.java
+++ b/app/src/main/java/eu/faircode/email/FragmentMessages.java
@@ -3673,11 +3673,13 @@ public class FragmentMessages extends FragmentBase
 
                     String body = Helper.readText(message.getFile(context));
                     String text = HtmlHelper.getFullText(context, body);
-                    String preview = HtmlHelper.getPreview(text);
 
-                    if (!TextUtils.isEmpty(preview))
+                    // Avoid: Not enough namespace quota ... for ...
+                    text = HtmlHelper.truncate(text, TTSHelper.getMaxTextSize() / 3);
+
+                    if (!TextUtils.isEmpty(text))
                         sb.append(context.getString(R.string.title_rule_tts_content))
-                                .append(' ').append(preview);
+                                .append(' ').append(text);
 
                     return sb.toString();
                 }
diff --git a/app/src/main/java/eu/faircode/email/TTSHelper.java b/app/src/main/java/eu/faircode/email/TTSHelper.java
index 1011fc5647..fbdf9c8bd9 100644
--- a/app/src/main/java/eu/faircode/email/TTSHelper.java
+++ b/app/src/main/java/eu/faircode/email/TTSHelper.java
@@ -20,6 +20,7 @@ package eu.faircode.email;
 */
 
 import android.content.Context;
+import android.os.OperationCanceledException;
 import android.speech.tts.TextToSpeech;
 import android.speech.tts.UtteranceProgressListener;
 
@@ -61,7 +62,9 @@ public class TTSHelper {
                             " available=" + available +
                             " utterance=" + utteranceId +
                             " text=" + text);
-                    instance.speak(text, flush ? TextToSpeech.QUEUE_FLUSH : TextToSpeech.QUEUE_ADD, null, utteranceId);
+                    int error = instance.speak(text, flush ? TextToSpeech.QUEUE_FLUSH : TextToSpeech.QUEUE_ADD, null, utteranceId);
+                    if (error != TextToSpeech.SUCCESS)
+                        throw new OperationCanceledException("TTS error=" + error);
                 } catch (Throwable ex) {
                     Log.e(ex);
                 }
@@ -126,4 +129,8 @@ public class TTSHelper {
                 speak.run();
         }
     }
+
+    static int getMaxTextSize() {
+        return TextToSpeech.getMaxSpeechInputLength();
+    }
 }