If you implement SPF, also implement SRS for forwarding addresses - if
you have any.
www.openspf.org points out the SPF gotchas and explains
SRS.
http://www.openspf.org/Best_Practices/Forwarding
http://www.openspf.org/SRS
http://www.infradead.org/rpr.html has an example Exim implementation,
although I'm sure there are newer examples floating around somewhere.
SPF is widely [mis]used. Educate yourself on it's pros and cons
before doing it yourself.
-Ken
----- Message from a.smith@??? ---------
Date: Wed, 5 Mar 2008 21:52:48 +0100
From: Andy Smith <a.smith@???>
Reply-To: Andy Smith <a.smith@???>
Subject: Re: [exim] Backscatter Spam Again. HELP PLEASE!
To: exim-users@???
> Hi Grant,
>
> If you haven't done so already you should implement SPF for all domains
> for which you send email. To be effective this also relies
> on the recieving side server supporting SPF but its pretty widespread so
> should have a very positive impact on your problem if
> you arent already using it. The other good thing is its technically very
> simple and easy to implement.
> The site for this is www.openspf.org which explains what it does and how to
> implement it,
>
> thanks, Andy.
>
>
> ----- Original Message -----
> From: Author: Grant Peel
> Subject: Re: [exim] Backscatter Spam Again. HELP PLEASE!
>
>
>>
>>
>> Matt, Peter and all,
>> No these are backscatter bounces.
>> Non existent addresses on my server(s) are being sent SPAM with forged
>> remote 'From:' addresses. Then, those spams are being bounced to the remote
>> address' (from my servers)!
>> -Grant
>
>
> --
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> ## Exim details at http://www.exim.org/
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>
----- End message from a.smith@??? -----
