From owner-freebsd-questions@FreeBSD.ORG  Tue Jan 13 23:29:08 2009
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 DAF9C10657B6
	for <freebsd-questions@freebsd.org>;
	Tue, 13 Jan 2009 23:29:08 +0000 (UTC)
	(envelope-from fbsd.questions@rachie.is-a-geek.net)
Received: from mail.rachie.is-a-geek.net (rachie.is-a-geek.net [66.230.99.27])
	by mx1.freebsd.org (Postfix) with ESMTP id A92658FC14
	for <freebsd-questions@freebsd.org>;
	Tue, 13 Jan 2009 23:29:08 +0000 (UTC)
	(envelope-from fbsd.questions@rachie.is-a-geek.net)
Received: from localhost (mail.rachie.is-a-geek.net [192.168.2.101])
	by mail.rachie.is-a-geek.net (Postfix) with ESMTP id E14A5AFBC3C;
	Tue, 13 Jan 2009 14:29:07 -0900 (AKST)
From: Mel <fbsd.questions@rachie.is-a-geek.net>
To: freebsd-questions@freebsd.org,
 Pieter Donche <Pieter.Donche@ua.ac.be>
Date: Tue, 13 Jan 2009 14:29:07 -0900
User-Agent: KMail/1.9.10
References: <Pine.GSO.4.63.0901132255420.9369@hmacs.cmi.ua.ac.be>
In-Reply-To: <Pine.GSO.4.63.0901132255420.9369@hmacs.cmi.ua.ac.be>
MIME-Version: 1.0
Content-Type: text/plain;
  charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
Message-Id: <200901131429.07667.fbsd.questions@rachie.is-a-geek.net>
Cc: 
Subject: Re: receiving mail
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: Tue, 13 Jan 2009 23:29:11 -0000

On Tuesday 13 January 2009 13:20:33 Pieter Donche wrote:

> 'Returned mail: see transcript for details":
>
>     ----- The following addresses had permanent fatal errors -----
> <user@host2.domain.topdom>
>
>     ----- Transcript of session follows -----
> 550 5.1.2 <user@host2.domain.topdom>... Host unknown (Name server:
> mailhost.domain.topdom: host not found)
> -------------
>
> host1 and host2 are both behind a firewall, but they are in the same
> zone (so firewall rules do not apply), both are even connected to same
> switch and their IPs are in the same subnet.
> Both have fixed IP address (not DHCP)
>
> mailhost.domain.topdom does not exist in DNS, but host1 can send
> mail to other mailservers all over the world.

MX record for host2.domain.topdom resolves to an unknown 
mailhost.domain.topdom.
See: host -t MX host2.domain.topdom on host1.domain.topdom.

-- 
Mel

Problem with today's modular software: they start with the modules
    and never get to the software part.