On Tue, 24 Jul 90 16:09:44 O Eric Thomas said:
>>This  would require  more overhead,
>More importantly, how is LISTSERV@FOO  supposed to know that LISTSERV@BAR
>sent you the same posting for another  list they have down there and that
>it knows  basically nothing  about?
Whenever  a  posting with  more  than  one  LIST-address is  received  the
following actions have to be taken:
a) Regardless of peers the mail is fanned out to every LISTSERV indicating
   that there's another one (two,...,n) postings with identical content on
   it's way.
b)  The postings  are held  at the  target LISTSERVs  until all  identical
   postings have been received.
c) The  list of final recipients  is built so  that only a single  copy is
   sent to  an individual. If  there is no  recipient then the  posting is
   simply discarded.
Of course this works only on backbone sites since it must be determined if
multiple To: addresses refer to lists or individuals.
Well ... ? (don't take it too serious !!)
 
Another solution:
If  the  original  Message-ID  is  preserved a  smart  MUA  can  sort  out
duplicates.
 
Serious stuff:
I always  wanted an  option (maybe  in the  subject as  for semi-moderated
list) to indicate that I do NOT  want the posting to be archived ... (like
this one).
 
Christian