[Mailman-Users] Preventing Cross Posting

[Bryan Carbonnell]

Is there anyway to prevent posts from being cross posted across
several lists on the same Mailman installation?

I'm running into 2 situations that i'd like to prevent

1) Cross-posting with several list names in the to or cc headers
2) Individual identical messages sent separately to different lists

Is this possible without resorting to a clue-by-four for the offending users?

Nothing popped up in a FAQ and archive search.

Thanks,

-- 
Bryan Carbonnell - carbonnb at gmail.com
Life's journey is not to arrive at the grave safely in a well
preserved body, but rather to skid in sideways, totally worn out,
shouting "What a great ride!"