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Re: Obeying SPF for relaying customers

To: qmail@list.cr.yp.to
Subject: Re: Obeying SPF for relaying customers
From: Andrew Richards <ar-djblists@nwdb.co.uk>
Date: Sat, 19 May 2007 07:29:10 +0100
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On Friday 18 May 2007 14:49, Oliver Welter wrote:
> Big trouble here - I have a customer that relays through my server.
> He relays using the address of his employeer as sender and sends
> mails to other people at this employeer. Their server has published
> SPF records and the Spam Wall blacklists me because I am trying to
> send mail that breaks the SPF rules.
>
> Is there a trick to ensure that relaying people can use only local
> domains as sender address or at least to reject mails based on SPF
> ?
>
> I am runnin netqmail with qmail-scanner

Another approach would be to add an extra check to qmail-smtpd.c, 
like,
http://www.metesek.com/projects/qmail-gmfcheck/project_qmail-gmfcheck.php

cheers,

Andrew.
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