cutting off the ends of messages by matching a certain line

I am on several lists which insist on giving me a very long blurb  
(sometimes longer than the message itself) at the end of each  
message sent to the list.

The "real" part of the message always ends the same way, so I would  
like to use that as a "trigger" and have procmail dump the rest of  
the message.  Is this possible?  Is it advisable?  Clues?

Thanks
TjL

--
Tj Luoma (luomat(_at_)peak(_dot_)org) / http://www.next.peak.org/~luomat
        
        *** I will be out of town from Dec 19th - Dec 31st ***