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Date:      Thu, 9 Jul 1998 14:22:42 -0700 (PDT)
From:      "Jonathan M. Bresler" <jmb>
To:        jlp@Part.NET (Jan L. Peterson)
Cc:        jmb@FreeBSD.ORG, isp@hub.freebsd.org
Subject:   Re: not-for-mail headers
Message-ID:  <199807092122.OAA27310@hub.freebsd.org>
In-Reply-To: <199807092103.PAA21015@loa.part.net> from "Jan L. Peterson" at "Jul 9, 98 03:03:47 pm"

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Jan L. Peterson wrote:
> > 	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?  :-)

	not at all!   i remember bang-paths, through i never had to 
	user them much.

	so if a not-for-mail header appears at freebsd.org, 
	the mail message is an "escapee" from some news server,
	and i can drop it...we dont accept mail from news, but 
	allow, even encourage, mail to news gateways.

jmb

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