Does LISTSERV retain the Message-ID: header?  If it doesn't, and could be
made to, that would probably be a good idea, since that's what the News
software uses to prevent duplications.  (Actually, it's only one of several
mechanisms, but it's the only one that matters in this case.)
 
                                Carl Fongheiser
                                CMF@PITTUNIX
                                [log in to unmask]