diff --git a/fhem/FHEM/00_MQTT2_CLIENT.pm b/fhem/FHEM/00_MQTT2_CLIENT.pm
index 5d8619900..21cc28ae0 100644
--- a/fhem/FHEM/00_MQTT2_CLIENT.pm
+++ b/fhem/FHEM/00_MQTT2_CLIENT.pm
@@ -872,12 +872,16 @@ MQTT2_CLIENT_feedTheList($$$)
disconnectAfter <seconds>
if set, the connection will be closed after <seconds> of
inactivity, and will be automatically reopened when sending a command.
-
+
ignoreRegexp
if $topic:$message matches ignoreRegexp, then it will be silently ignored.
-
+ For general purpose servers, it is a good idea to set it e.g. to
+
+ homeassistant/[^:"]+/config|tasmota/discovery/[^/:]+/(config|sensors)
+
and also include the topics used to send commands towards your MQTT
+ clients.
lwt <topic> <message>