From owner-freebsd-questions  Thu Sep 18 05:06:37 1997
Return-Path: <owner-freebsd-questions>
Received: (from root@localhost)
          by hub.freebsd.org (8.8.7/8.8.7) id FAA01821
          for questions-outgoing; Thu, 18 Sep 1997 05:06:37 -0700 (PDT)
Received: from BIGFUN.vwcom.com (BIGFUN.vwcom.com [151.197.101.21])
          by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id FAA01815
          for <questions@FreeBSD.ORG>; Thu, 18 Sep 1997 05:06:34 -0700 (PDT)
Received: from WillsCreek.COM (gw.willscreek.com [151.197.101.46])
	by BIGFUN.vwcom.com (8.8.6/8.8.6) with ESMTP id IAA02523
	for <questions@FreeBSD.ORG>; Thu, 18 Sep 1997 08:01:55 -0400 (EDT)
Received: from current.willscreek.com (bmc@current.willscreek.com [172.16.87.1])
	by WillsCreek.COM (8.8.5/8.8.5) with ESMTP id IAA18215
	for <questions@FreeBSD.ORG>; Thu, 18 Sep 1997 08:06:31 -0400 (EDT)
Received: (from bmc@localhost)
	by current.willscreek.com (8.8.5/8.8.5) id IAA00477;
	Thu, 18 Sep 1997 08:06:30 -0400 (EDT)
Date: Thu, 18 Sep 1997 08:06:30 -0400 (EDT)
Message-Id: <199709181206.IAA00477@current.willscreek.com>
From: Brian Clapper <bmc@WillsCreek.COM>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
To: questions@FreeBSD.ORG
Subject: Re: Re-write sendmail sender address rules?
In-Reply-To: <971121@toto.iv>
X-Mailer: VM 6.23 under Emacs 19.34.1
Sender: owner-freebsd-questions@FreeBSD.ORG
X-Loop: FreeBSD.org
Precedence: bulk

root@ns1.apginet.com wrote:

> Greetings,
>
> We are working on using sendmail as a relay host for internal mail
> servers.  So far, the internal mail servers are forwarding all
> outbound mail to the main mail server.  However, once that relay
> sends the mail, the "FROM" field still reveals the relay's true
> host name.
>
> What method can be used to "hide" the host name so that all mail
> appears to come from "user@domain.tld" ?
>
> Please send any replies to root@ns1.apginet.com.
>
> Thanks.

Assuming you're using sendmail 8.8.something, see the README file in the
`cf' subdirectory of the sendmail source tree.  You want the stuff on host
masquerading.  In particular, see the section entitled "MASQUERADING AND
RELAYING", and read the paragraphs describing "allmasquerade",
"limited_masquerade", and "masquerade_entire_domain" in the "FEATURE"
section.

See http://www.sendmail.org/ for pointers to other docs and sources of help.
-----
Brian Clapper, bmc@WillsCreek.COM, http://WWW.WillsCreek.COM/
Injustice anywhere is a threat to justice everywhere.
        -- Martin Luther King, Jr.