--- mailman-2.1.5.1/misc/mailman.in.retval	2007-07-30 13:52:52.000000000 +0200
+++ mailman-2.1.5.1/misc/mailman.in	2007-07-30 13:54:47.000000000 +0200
@@ -139,5 +139,10 @@
     RETVAL=$?
     ;;
 
+*)  
+    echo $"Usage: $prog {start|stop|restart|condrestart|status}"
+    RETVAL=3
+    ;;
+
 esac
 exit $RETVAL