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Re: [vox-tech] spam greylisting (was: [vox] Posting to the lists)
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Re: [vox-tech] spam greylisting (was: [vox] Posting to the lists)



On Friday 22 December 2006 08:23, Peter Jay Salzman wrote:
...
> I was also thinking of looking into SPF.  I know it's flawed, but I'd like
> to take a look to see if it might work for me anyhow.  Do you know if anyone
> is using it these day?

I do publish and check SPF records, however it's rather limited and
doesn't catch much.  Its main benefit is helping you decide if a
message really did come from whom it claims.  For example here are
some headers from a message I received a few days ago:

Return-Path: <goodsam@goodsamclub.com>
Received-SPF: pass (ns1: domain of goodsam@goodsamclub.com designates 12.17.223.121 as permitted sender)
Received: from co-exch.den.agi-corp.com (mail-co.affinitygroup.com [12.17.223.121])

The "Received-SPF" header was generated by my server, and tells me
that even though the SMTP client mail-co.affinitygroup.com does not
sound at all like the Good Sam Club, it is in fact authorized to send
mail on the club's behalf.

> Again, thanks for mentioning this!

My pleasure!

Rod
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