How does one determine which of many hundreds of userids subscribed to a
list is responsible for forwarding email to a now-non-existant userid@host
which bears no relation at all to any of the subscribers?  If I forward my
mail off into oblivion (say, forward to "[log in to unmask]"), how is a
listowner ever to find the source of this bounce?  Is there a way to
coerce LISTSERV into individually addressing mail for a list temporarily
so the headers come back with a real destination userid instead of
"multiple recipients of list blahblah"?
 
--Brick