[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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