stuart at bmsi
Apr 23, 2008, 11:44 AM
Post #2 of 2
(3519 views)
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On Wed, 23 Apr 2008, Cliff Nieuwenhuis wrote:
> The recipient is someone at platecoinc.com. The MX record for platecoinc.com
> has mail going to server24.appriver.com
>
> AppRiver is a spam/virus filtering company. When they have finished checking
> for spam and viruses, mail is sent to 'mail.wegtech.com', which is where
> the e-mail mailboxes for platecoinc.com are hosted.
>
> When AppRiver attempts to pass along the 'clean' message from sender [at] kroll
> to recip [at] platecoinc, the mail server (mail.wegtech.com) won't
> accept it based on SPF. I discussed this with AppRiver a bit and they assure
> me that "we do not 're-write the sender address from SPF checks.'"
AppRiver is behaving reasonably - it is not their fault. The problem is the
recipient at platecoinc.com. Checking SPF for your own MX servers has got
to be the most idiotic thing people keep doing when implementing SPF.
Try to find someone at platecoinc.com and explain to them nicely
why checking SPF on your own MX is not the smartest idea.
There is no point in platecoinc.com checking SPF at all, in fact, since
essentially all their mail goes through AppRiver. Unless AppRiver
checks it, or they look at the Received header from AppRiver instead
of using the connect IP, they cannot check SPF. When talking to
AppRiver, suggest that they add a Received-SPF header for clients to use.
Would SRS solve the problem? Well, it would stop the incorrect bounces,
but checking SPF would still be pointless for platecoinc, since the sending
domain would always be AppRiver! So there is no reason for AppRiver to waste
their time doing it.
--
Stuart D. Gathman <stuart [at] bmsi>
Business Management Systems Inc. Phone: 703 591-0911 Fax: 703 591-6154
"Confutatis maledictis, flammis acribus addictis" - background song for
a Microsoft sponsored "Where do you want to go from here?" commercial.
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