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Path: utzoo!watmath!clyde!burl!hou3c!mike@BRL-TGR.ARPA
From: mike@BRL-TGR.ARPA (Mike Muuss)
Newsgroups: net.mail.msggroup
Subject: Re:  redistribution lists
Message-ID: <596@hou3c.UUCP>
Date: Thu, 24-May-84 20:23:43 EDT
Article-I.D.: hou3c.596
Posted: Thu May 24 20:23:43 1984
Date-Received: Fri, 1-Jun-84 08:36:19 EDT
Sender: ka@hou3c.UUCP (Kenneth Almquist)
Lines: 14
To: Laura Creighton <utzoo!laura@seismo>
Cc: MsgGroup@BRL-MIS.ARPA

BRL specificly adjusts the SMTP MAIL FROM field so that failure notifications
from the Unix-Wizards list go to Unix-Wizards-Request.

However, there are some sites (most notably the PDP-20 systems) which
are "very clever", and discard the MAIL FROM field, and re-parse the
header.  If such a site has a "mail exploder" which further redistributes
the Unix-Wizards mail, and there is a problem, they will return the
messages back to the sender, rather than Unix-Wizards-Request.
The 4.1 BSD (BBN) UNIX systems also exhibit this problem; 4.2's SENDMAIL
seems to do it right.

I doubt that we will ever get all the systems on the net to ever
implement the specification correctly.
	-Mike