From owner-freebsd-questions@FreeBSD.ORG  Wed Mar 20 13:26:39 2013
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From: naddy@mips.inka.de (Christian Weisgerber)
Subject: Re: fetchmail/sendmail: Domain of sender address does not exist
Date: Wed, 20 Mar 2013 12:55:56 +0000 (UTC)
Message-ID: <kicbks$2b12$1@lorvorc.mips.inka.de>
References: <201303070940.r279elHS001082@mech-cluster241.men.bris.ac.uk>
Originator: naddy@mips.inka.de (Christian Weisgerber)
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Anton Shterenlikht <mexas@bristol.ac.uk> wrote:

> I sometimes see fetchmail complain:
> 
> fetchmail: SMTP error: 553 5.1.8 <admin@system.mail>... Domain of sender
> address admin@system.mail does not exist

Add FEATURE(accept_unresolvable_domains) to your sendmail configuration.

-- 
Christian "naddy" Weisgerber                          naddy@mips.inka.de