Date: Mon, 22 Jan 2001 11:02:11 -0500 From: "Mike Atkinson" <mikea@kconline.com> To: <freebsd-questions@freebsd.org> Subject: Sendmail - Bounces from local host relays sent From:<> Message-ID: <00d301c0848c$ade185e0$1385f1d8@rim.kconline.com>
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We are running Sendmail 8.11.1 with FreeBSD 4.2 on 3 MTA's on our system.
After mail arrives into one of our MTA's for an invalid user on another
host, the resulting bounce message to the original sender is generated with
an empty MAIL FROM: value (if it is being sent to a recipient on a host
other then the MTA generating the bounce.) The headers of the bounce
message appear valid but the maillog of the bounce recipient shows the
following:
---
Jan 22 10:40:04 rim sendmail[21591]: f0MFe4L21591: from=<>, size=2246,
class=0, nrcpts=1, msgid=<200101221539.f0MFd0A33621@ns.kconline.com>,
proto=ESMTP, daemon=MTA, relay=ns.kconline.com [216.241.132.3] *(Note the
from=<> in the log record.)*
---
The actual header in the received bounce looks ok:
---
Return-Path: <MAILER-DAEMON>
Received: from ns.kconline.com (ns.kconline.com [216.241.132.3])
by rim.kconline.com (8.11.1/8.11.1) with ESMTP id f0MFe4L21591
for <mikea@rim.kconline.com>; Mon, 22 Jan 2001 10:40:04 -0500 (EST)
Received: from localhost (localhost)
by ns.kconline.com (8.11.1/8.11.1) id f0MFd0A33621;
Mon, 22 Jan 2001 10:39:00 -0500 (EST)
(envelope-from MAILER-DAEMON)
Date: Mon, 22 Jan 2001 10:39:00 -0500 (EST)
From: Mail Delivery Subsystem <MAILER-DAEMON@ns.kconline.com>
Message-Id: <200101221539.f0MFd0A33621@ns.kconline.com>
To: mikea@rim.kconline.com
---
Some hosts outside of our system (and some of our virtual host clients) are
rejecting these bounces claiming an invalid sender:
---
----- The following addresses had permanent fatal errors -----
<lmast@forestriverinc.com>
(reason: 501 bogus mail from)
----- Transcript of session follows -----
... while talking to mail.forestriverinc.com.:
>>> MAIL From:<> SIZE=5133
<<< 501 bogus mail from
501 5.6.0 <lmast@forestriverinc.com>... Data format error
---
(Or some similar rejection message depending on the MTA of the recipient.)
I haven't been able to figure out so far why this is happening and have
searched the FreeBSD and Sendmail archives for a solution. Can anyone shed
some light on why this is happening and what we might have misconfigured to
cause this behavior?
-----
Mike Atkinson - mikea@kconline.com
KC Online, Inc. - System Administration
-----
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