[BBLISA] ISPs with p=reject DMARC policies?

Edward Ned Harvey (bblisa4) bblisa4 at nedharvey.com
Thu Oct 6 09:26:40 EDT 2016


> From: bblisa [mailto:bblisa-bounces at bblisa.org] On Behalf Of Dan Ritter
> 
>   Mitigating the effects of the DMARC reject policy are difficult.
>   All known mitigation techniques break some user expectations
>   and/or degrade the user experience.

"break user expectations and/or degrade the user experience" is synonymous with "rawr, I want a random email server on the internet to be able to relay mail from me, I don't like it when things in the world change, rawr." And your response is "change to a different email provider," which is an even bigger change.

If you set dmarc_moderation_action = Munge From, the behavior is: Users send email to the list. The list distributes the message. Recipients still see "From" the original user, "via the list," because in fact, the list modified the message. Recipients are still able to reply privately to the sender, or to the list. They're still able to see who it was from. Everything simply works.

Take this list, for example. bblisa at bblisa.org. Notice that the From address says "from bblisa-bounces on behalf of Dan Ritter." You can ask our list moderators how the list is configured - Are we using "Munge From?" or some other setting?

I wouldn't have even noticed that particular detail about this list, except that we're having a conversation about it, so I specifically looked for it. I'm on dozens of mailing lists, and this has simply become the new normal. You don't hear anyone complaining about it on this list. And I don't hear anyone complaining about it on any other lists.

I dunno. Maybe everyone has quit using Yahoo already.



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