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

Dave Crocker <dhc@dcrocker.net> Tue, 28 July 2020 10:37 UTC

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To: Alessandro Vesely <vesely@tana.it>, dmarc@ietf.org
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From: Dave Crocker <dhc@dcrocker.net>
Organization: Brandenburg InternetWorking
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Subject: Re: [dmarc-ietf] Fwd: New Version Notification for draft-crocker-dmarc-author-01.txt
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On 7/28/2020 12:26 AM, Alessandro Vesely wrote:
> 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.  

So you want to define DMARC as applying to both the From: field and the 
Author: field?  That will defeat the benefit intended for the Author: field.


>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.

How, exactly?


d/

-- 
Dave Crocker
Brandenburg InternetWorking
bbiw.net

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