diff --git a/FHEM/00_MQTT2_SERVER.pm b/FHEM/00_MQTT2_SERVER.pm
index 208fef34c..c7ae9da35 100644
--- a/FHEM/00_MQTT2_SERVER.pm
+++ b/FHEM/00_MQTT2_SERVER.pm
@@ -445,6 +445,7 @@ MQTT2_SERVER_sendto($$$$)
         pack("n", length($topic)).
         $topic.$val);
     }
+    last;       # send a message only once
   }
 }