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Date:      Wed, 14 Feb 2001 08:06:58 +0100
From:      Christoph Sold <so@server.i-clue.de>
To:        Peter Brezny <peter@black.purplecat.net>
Cc:        freebsd-questions@FreeBSD.ORG
Subject:   Re: mail refused. dns problems?
Message-ID:  <3A8A2E92.D2DA0CB3@i-clue.de>
References:  <Pine.BSF.4.05.10102131533380.10098-100000@black.purplecat.net>

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Peter Brezny schrieb:
> 
> The freebsd mail list is no longer accepting mail from my domain.
> 
> i've recently installed qmail and moved our domain's mail onto the new
> server.
> 
> here's the error that the freebsd lists send back.
> 
> @400000003a899a2f14fd217c status: local 0/10 remote 1/20
> @400000003a899a2f1b035a14 delivery 106: deferral:
> 216.136.204.18_does_not_like_recipient./Remot
> e_host_said:_450_Client_host_rejected:_cannot_find_your_hostname,_[209.16.228.145]/Giving_up_on
> _216.136.204.18./
> 
> i think my problem is that sysadmin-inc.com exists on a separate machine
> than mail.sysadmin-inc.com.

The reverse DNS lookup does not work for your new mailhost. To have
FreeBSD.org accept mail from your mail server, reverse name mapping has
to work. This is because most spammers won't bother to set up reverse
name maps for their spam hosts.

HTH
-Christoph Sold


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