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Re: [dmarc-ietf] Fwd: New Version Notification for draft-crocker-dmarc-author-01.txt

Alessandro Vesely <vesely@tana.it> Tue, 28 July 2020 07:27 UTC

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From: Alessandro Vesely <vesely@tana.it>
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Date: Tue, 28 Jul 2020 09:26:45 +0200
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Subject: Re: [dmarc-ietf] Fwd: New Version Notification for draft-crocker-dmarc-author-01.txt
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On Mon 27/Jul/2020 20:51:54 +0200 Dave Crocker wrote:
> On 7/27/2020 11:15 AM, Alessandro Vesely wrote:
>> If receivers lookup the Author: domain too, they can evaluate authentication 
>> and alignment also with respect to that domain.
> 
> 
> Since there is no authentication or alignment associated with the Author field, 
> I don't know how they can be evaluated.


Receivers can evaluate the Author: domain just like they would do if it were 
the From: domain.  As a new field, Author: doesn't wear a reliable-id trophy, 
hence receivers may refrain to apply policy dispositions.  However, the result 
of the evaluation, conveyed through aggregate report, can tell MLMs if 
rewriting From: was necessary.

That's the only kind of strategy I see for limiting From: rewriting horizon.


Best
Ale
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