Error address

In article <37g2atoy0k.fsf@salvator.cs.ubc.ca>,
Brian Edmonds  <bedmonds@cs.ubc.ca> wrote:
>If you're running sendmail, and if sendmail is configured to do this.

Err, no, if you're running *any* properly configured mail system.

Internet standard STD 11 (RFC 822) says...

     4.3.1.  RETURN-PATH

        This field  is  added  by  the  final  transport  system  that
        delivers  the message to its recipient.  The field is intended
        to contain definitive information about the address and  route
        back to the message's originator.

Tim.
--
Tim Goodwin   | "continuous witter about large metal wanking
Cambridge, UK | machines" -- Robin Fairbairns, about uk.transport.

Original headers:

From: tim@pipex.net (Tim Goodwin)
Newsgroups: comp.mail.headers
Subject: Re: Error address
Date: 29 Mar 1996 16:20:13 GMT
Organization: Unipalm PIPEX
Message-ID: <4jh2jt$2bc@wave.news.pipex.net>
References: <4inu2q$25o@news.scruz.net> <4jdtl0$4c@wave.news.pipex.net>
  <37g2atoy0k.fsf@salvator.cs.ubc.ca>