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Date:      Thu, 09 Jul 1998 15:03:47 -0600
From:      "Jan L. Peterson" <jlp@Part.NET>
To:        "Jonathan M. Bresler" <jmb@FreeBSD.ORG>
Cc:        isp@hub.freebsd.org
Subject:   Re: not-for-mail headers 
Message-ID:  <199807092103.PAA21015@loa.part.net>
In-Reply-To: Your message of "Thu, 09 Jul 1998 13:37:14 PDT." <199807092037.NAA21082@hub.freebsd.org> 
References:  <199807092037.NAA21082@hub.freebsd.org>

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> 	what does the "not-for-mail" header mean?

It means that you should not use the Path: header from a Usenet message 
in order to get back to the sender.  The Path header shows the path 
that the message took to get to you (what news servers it passed 
through).  In the olden days, e-mail addresses looked like this, too 
(bang paths, we called 'em).  Sometimes, people would send mail to 
them, assuming that it was a valid path for uucp-based mail to get back 
to the author.  This was often a bad assumption.

not-for-mail was appended at some point so that the mail would bounce 
and the sender would get the idea that the Path header was "not for 
mail".

Now, isn't that more than you wanted to know?  :-)

	-jan-
-- 
Jan L. Peterson         PartNET                    tel. +1 801 581 1118
Senior Systems Admin    423 Wakara Way, Suite 216  fax  +1 801 581 1785
jlp@part.net            Salt Lake City, UT 84108   http://www.part.net/



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