[Mailman-Users] Auto reject "Re: Digest ...."

[Paul H Byerly]

      I have just joined a mail list run by Lyris.  The system is 
configured to reject, with explanation, any post that has something like 
"Re: Mailman-Users Digest, Vol 16, Issue 61".  Anyone come up with a hack 
to do that on Mailman?  It looks like I could set up a regexp in Spam 
filters, but this would hold rather than reject the message.

<>< Paul