>Recently there has been a flood of mailings that are adressed to three
>or more lists at a time.  A lot of people are subscribed to more than of
>these lists, and receive multiple copies.  [...]
>A simple solution would be to have listserv check if a posting is for
>multiple lists.  In such a case it should send out only one copy to all
>users that are in more than one lists.
 
Here, here!  Combine the distribution lists, weed out duplicates, and ship
it as one big distribute.  But...
 
You need some mechanism to inform LISTSERV of this.  If you simply mail a
posting to multiple lists, you get multiple copies in the LISTSERV mailboxes
for the list(s), probably at different times.  Perhaps something like a
tag 'X-Lsv-include:'.  It would only work when the different lists were at
the same host site.  A little complicated, but possible.
 
/Jeff/