[Mailman-Users] Vacation email loop

I had a situation where a user on one of my lists had the vacation utility turned on and a posting to the list resulted in a looped email because the vacation email response was then posted and on and on. The reply-to posts option has been set to "the list" and I would like to keep this setting. Is there any setting that can be changed to keep this from happening? I can not always depend on the user disabling their account on the list server. I need a way for the list server to recoginize this looping is happening and take action.

Thank you, Clark Cooper