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What's Errors-To:?

In article <0170_2d1892d6@cpubbs.cuug.ab.ca>, Paul Werbicki
<werbickp@cpubbs.cuug.ab.ca> wrote:
>Errors-To: is like the Reply-To: header.  [...]

A better analogy is with `Return-Receipt-To:'.

Both try to solve problems which should be dealt with in the envelope,
not the message headers.  Neither is defined anywhere (not even their
syntax, let alone what they're supposed to mean).  And both are
understood by sendmail, but not much else.  Such patchy deployment makes
them all but useless.

The sendmail 8 documentation says this.

    The Errors-To: header was created in the bad old days when UUCP
    didn't understand the distinction between an envelope and a header;
    this was a hack to provide what should now be passed as the envelope
    sender address.  It should go away.

Tim.
--
Tim Goodwin | "Alvestrand's equality: gateways = pain"
PIPEX Ltd   |     -- Harald T Alvestrand.

Original headers:

From: tim@pipex.net (Tim Goodwin)
Newsgroups: comp.mail.headers
Subject: Re: What's Errors-To:?
Date: 29 Dec 1993 15:53:28 -0000
Organization: PIPEX Ltd, Cambridge, UK.
Message-ID: <2fs95o$7f1@tank.pipex.net>
References: <John.MacFarlane.165.000B2FC3@Software.com>
  <0170_2d1892d6@cpubbs.cuug.ab.ca>

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