Re: [dmarc-ietf] DMARC-Compliant Mailing Lists

[Douglas Foster <[e-mail]>]

>From a security perspective, Ale's proposal is flawless.   But I don't like
solutions that make the recipient bear most of the costs of the list's
actions.     Unmunging creates a high cost of entry for new domains:

Under a collaboration solution, the subscriber goes to her email support
and says,"I joined list X, and they say that for the best user experience,
we need to configure a whitelist entry to bypass From Filtering on messages
from one SPF-verified SMTP address.    Then I need to give them a response
whether this change has been implemented or not."

Under an unmunging solution, the subscriber conversation is more like this,
"I joined list X, and they say that for the best user experience, we need
to configure an unmunging MTA.   Hope this is not too much trouble.  I hope
you can get this implemented quickly."

Doug Foster