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postfix-users: Re: ot: spf bounce on forwarded email

Re: ot: spf bounce on forwarded email

From: Sean Reifschneider <jafo_at_nospam>
Date: Tue Apr 06 2010 - 09:19:03 GMT
To: lists@sbt.net.au

On 04/05/2010 08:00 PM, Voytek Eymont wrote:
> I've set up a number of aliases to redirect emails to the desired new
> addresses on a remote server, that seemed to work fine

What you need to do is SRS -- Sender Rewriting Scheme:

   http://en.wikipedia.org/wiki/Sender_Rewriting_Scheme

See the very end for the discussion of how it relates to SPF.

In short, you are forwarding to an SPF-enabled host without doing SRS,
which causes problems. If you are doing SPF already on your incoming mail,
it should be safe for the destination host to disable SPF for messages
coming from your host. Otherwise you're going to have to implement SRS.

Sean
-- Sean Reifschneider, Member of Technical Staff <jafo@tummy.com> tummy.com, ltd. - Linux Consulting since 1995: Ask me about High Availability