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From: MRC%PANDA@sumex-aim.arpa (Mark Crispin)
Newsgroups: comp.mail.headers
Subject: Re: rmail-reply-to-sender
Message-ID: <871@brl-adm.ARPA>
Date: Mon, 17-Nov-86 22:32:28 EST
Article-I.D.: brl-adm.871
Posted: Mon Nov 17 22:32:28 1986
Date-Received: Tue, 18-Nov-86 03:23:19 EST
Sender: news@brl-adm.ARPA
Lines: 18

NO!!!!!

A mail composition program must NEVER, repeat, NEVER!! generate a reply
to a Sender or a Return-Path.

A valid From field is required in all Internet messages.  The Reply-To
field overrides a From for reply purposes, but that does not eliminate
the need for a valid From field.  Nor does the presence of Sender and
Return-Path fields (neither of which have anything to do with a reply
address).

In this day and age when certain vendors are "certifying" their TCP/IP
implementations by testing them against random Unix systems, it is
vitally important that implementations which take excessive liberties
with the protocols be firmly suppressed.

-- Mark --
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