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Date:      Tue, 13 Jan 2009 14:29:07 -0900
From:      Mel <fbsd.questions@rachie.is-a-geek.net>
To:        freebsd-questions@freebsd.org, Pieter Donche <Pieter.Donche@ua.ac.be>
Subject:   Re: receiving mail
Message-ID:  <200901131429.07667.fbsd.questions@rachie.is-a-geek.net>
In-Reply-To: <Pine.GSO.4.63.0901132255420.9369@hmacs.cmi.ua.ac.be>
References:  <Pine.GSO.4.63.0901132255420.9369@hmacs.cmi.ua.ac.be>

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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.



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