>Solutions such as encapsulation of the original message or noting how to 
>recreate the message in a
>manner that would pass DKIM, or addressing as the site actually sending the 
>message all meet a "least
>work" standard that various whitelist proposals all seem to fail as far as 
>I've seen.

The encapsulation plan appears to assume that every MUA in the world
will be rewritten to recognize and unwrap anti-DMARC encapsulated mail.

That seems kind of optimistic.

With a shared whitelist, MTAs that interpret DMARC policies check the
whitelist to know when to skip the policy checks.  The MUAs, mailing
lists, mail-an-article etc. don't change at all.  The usual handles
for whitelists are DKIM signatures or IPs, neither of which need to be
tied to "forwarding domains".

I agree that a whitelist published per sender is a poor idea,
combining the worst scaling aspects of just about every other
suggestion.

R's,
John
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