[Mimedefang] SPF and really stupid mailers

David F. Skoll dfs at roaringpenguin.com
Wed Jul 12 11:22:37 EDT 2006

WBrown at e1b.org wrote:

> This morning, I had an issue come up with a customer involving 
> Hallmark.com trying to send a greeting card through our filters. 
> Apparently Hallmark uses the email address of the sender as entered on the 
> web form as the SMTP  Mail From: data.  That's all well and good until 
> someone uses a domain like Adelphia.net who has an SPF record that says 
> "-all".  General practice is to add 5 points for SPF hard failures like 
> this, so the message eventually bounces.

This is a perfect illustration of why SPF is broken.

> Anyways, my question is how do you all handle stupid mailers like Hallmark
> when users complain about them getting blocked for poor email practices.

I don't handle them particularly.  I would petition Hallmark to use
something like greeting-card-bounce at hallmark.com as the envelope
sender and the entered e-mail address as the From: header.  You might
want to try that.



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