we can't have pure numerical titles

manifests/common.pp

@@ -218,7 +218,8 @@ define webhosting::common(
 
     if 'mail_ratelimit' in $configuration {
       exim::ratelimit::localforward::entry{
-        $real_run_uid:
+        $real_run_uid_name:
+          key       => $real_run_uid,
           ratelimit => $configuration['mail_ratelimit'];
       }
     }