> I'm the listmom for [log in to unmask] I've noticed that a one of
> my subscribers, [log in to unmask], often gets auto-deleted, sometimes 2
> or 3 times a day. The error-report form indiana.edu claims there's an
> invalid message-id. I finally found out that this id was present in a mail,
> generated by  [log in to unmask] His message-id <19987310834641@> is
> refused by the mailsoftware of indiana.edu, and Listserv wil auto-delete
> the indiana.edu user ! Yes, an innocent user is actually punished for the
> malformed Message-Id, which is probably generated by NETCOMplete, the
> mail-program from Netcom.com. The user didn't userstand this at all, and
> first claimed that I was playing a game with him (after having been
> auto-deleted 4 times in a day !)

Setting the user to short headers ought to to the trick.  That causes
LISTSERV to strip out many headers, including Message-ID.  The command is

   set blues-l short for [log in to unmask]