[gnu.emacs] don't send mail a 2nd time, when a MAILER-DAEMON reports a few

tower@AI.MIT.EDU (Leonard H. Tower Jr.) (07/03/89)

   Date: 2 Jul 89 19:23:35 GMT
   From: tale@rpi.edu  (David C Lawrence)
   Sender: info-gnu-emacs-request@prep.ai.mit.edu

   I had already mailed this off to superyank@cme.nist.gov last week;
   curiously, mail to one of the addresses (@hpl.hp.com) bounced, who I
   guess is ange.  I had also mailed it concurrently to
   info-gnu-emacs@ai.mit.edu but that bounced with an unknown user as did
   the same address at prep.  (Len?  Bob?  Temporary thing or did the
   list move or what?)

Temporary problem.  Upgrade from SunOS 3.5 to 4.0.3 at ai.mit.edu.

All a User Unknown message from a mailer usually means is that your
mail failed to reach ONE address on the list.  Such messages are NEVER
a reason to resend a piece of mail a 2nd time.  This just bothers all
(N - one) of the readers of the list with a message they have already
seen.  It also wastes computer and network resources.

It is appropriate to send these to the -request address for a list, in
this case, <info-gnu-emacs-request@prep.ai.mit.edu>, and ask them to
check delivery out.

thanx -len