From owner-freebsd-questions@FreeBSD.ORG  Fri Aug 31 00:42:52 2007
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 9704716A418
	for <freebsd-questions@freebsd.org>;
	Fri, 31 Aug 2007 00:42:52 +0000 (UTC)
	(envelope-from th.lacoste@wanadoo.fr)
Received: from smtp19.orange.fr (smtp19.orange.fr [80.12.242.18])
	by mx1.freebsd.org (Postfix) with ESMTP id 59C0213C46B
	for <freebsd-questions@freebsd.org>;
	Fri, 31 Aug 2007 00:42:52 +0000 (UTC)
	(envelope-from th.lacoste@wanadoo.fr)
Received: from smtp19.orange.fr (mwinf1907 [172.22.129.35])
	by mwinf1920.orange.fr (SMTP Server) with ESMTP id 96B495C61A42
	for <freebsd-questions@freebsd.org>;
	Fri, 31 Aug 2007 00:34:11 +0200 (CEST)
Received: from me-wanadoo.net (localhost [127.0.0.1])
	by mwinf1907.orange.fr (SMTP Server) with ESMTP id ECD951C00091
	for <freebsd-questions@freebsd.org>;
	Fri, 31 Aug 2007 00:34:09 +0200 (CEST)
Received: from [192.168.1.19]
	(ASte-Genev-Bois-151-1-3-138.w82-121.abo.wanadoo.fr [82.121.129.138])
	by mwinf1907.orange.fr (SMTP Server) with ESMTP id D4B541C00086
	for <freebsd-questions@freebsd.org>;
	Fri, 31 Aug 2007 00:34:09 +0200 (CEST)
X-ME-UUID: 20070830223409871.D4B541C00086@mwinf1907.orange.fr
From: Thierry Lacoste <th.lacoste@wanadoo.fr>
To: freebsd-questions@freebsd.org
Date: Fri, 31 Aug 2007 00:32:26 +0200
User-Agent: KMail/1.9.5
MIME-Version: 1.0
Content-Type: text/plain;
  charset="us-ascii"
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
Message-Id: <200708310032.26824.th.lacoste@wanadoo.fr>
Subject: strange sendmail problems
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 31 Aug 2007 00:42:52 -0000

Hello,

I experienced a strange problem with sendmail on FreeBSD 6.1
which happened during a routing problem on a network which
isolated my network from the outside.

On five out of seven boxes my logs started to show (capital names
used to hide real ones) :

Aug 30 15:53:13 MYHOST sm-mta[6247]: l7UAqbOp091438: to=USER@MYDOMAIN, 
delay=03:00:00, xdelay=00:00:00, mailer=esmtp, pri=618410, 
relay=MYMAILER.MYDOMAIN., dsn=4.0.0, stat=Deferred: Name server: 
MYMAILER.MYDOMAIN.: host name lookup failure

Running an MX query with nslookup on MYHOST was correctly giving
MYDOMAIN   mail exchanger = 1 MYMAILER.MYDOMAIN.
and 'host MYMAILER.MYDOMAIN' was correctly resolving the name.

The problem did not show up on two boxes.

All boxes run 6.1 and have default sendmail configurations.
The only difference that I can see is that the two unaffected boxes
run dhclient while the affected ones have static IP but I don't how
it could affect the issue.

Any idea what could explain this?

Regards,
Thierry.