From: shankar AT chromatic DOT com (Shankar Unni)
Subject: Re: operator message
5 Feb 1997 13:24:23 -0800
Approved: cygnus DOT gnu-win32 AT cygnus DOT com
Distribution: cygnus
Message-ID: <32F8D176.48AF.cygnus.gnu-win32@chromatic.com>
References: <Pine DOT LNX DOT 3 DOT 95 DOT 970205000048 DOT 135B-100000 AT romster DOT dsuper DOT net>
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Original-To: oyehia AT dsuper DOT net
Original-CC: Grant Leslie <grantl AT deerinet DOT nb DOT ca>, GNU-WIN32 <gnu-win32 AT cygnus DOT com>
Original-Sender: owner-gnu-win32 AT cygnus DOT com

do i care? wrote:

> actually this is a result of a fake email, apprently to means, pine knew
> that the message was fake, notice the sender address is from brazil, while
> it shows that he's the operator of cygnus...

Geez, it's nothing that fancy, folks. operator AT wherever seems to have
simply done

 /usr/lib/sendmail gnu-win32 AT cygnus DOT com 

with an empty body fed into stdin. Sendmail will stick in an
Apparently-To: synthesized from the recipients on the command line if
there's no "To:" line in the message (which there obviously isn't: he
seems to have fed an empty file to sendmail). The other headers are all
synthesized by sendmail in its normal course of operation..

The "To: " header is not guaranteed to exist..
-- 
Shankar Unni                                  shankar AT chromatic DOT com
Chromatic Research                            (408) 752-9488
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