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Re: [dmarc-ietf] 5.5.4. Publish a DMARC Policy for the Author Domain - dmarcbis-06

John Levine <johnl@taugh.com> Sun, 03 April 2022 02:49 UTC

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Date: 2 Apr 2022 22:49:03 -0400
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From: "John Levine" <johnl@taugh.com>
To: dmarc@ietf.org
Cc: sklist@kitterman.com
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Subject: Re: [dmarc-ietf] 5.5.4. Publish a DMARC Policy for the Author Domain - dmarcbis-06
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It appears that Scott Kitterman  <sklist@kitterman.com> said:
>Somewhat later than I had hoped, I've taken a shot at this.  Please see the 
>attached proposed update from dmarcbis-06 and rfcdiff.

Closer but of course, not quite right.

>2.  In the policy discovery section I added a few sentences on which policy to 
>use once the policy record is identified.  This doesn't change anything 
>relative to what's currently defined, but it seems to me that if we are going 
>to have a discussion of policy discovery we should take it all the way to 
>determining the poilcy and not stop at the determination of the record to use 
>to determine the policy.

It still gets the wrong answer for psd=n above psd=y.

I think it needs to say you walk up. At each step if you find psd=n,
that is the org domain and you stop. If you find psd=y, that is the
PSD, the org is the name beneath it, and you stop. (If the one beneath
it has no DMARC record, is it still the org domain? I think it is.)

If you get to the top and there was no record with psd=y or psd=n, the
org is the highest DMARC record you found.

This means if you find psd=n or psd=y you stop, if you find psd=u keep going.

R's,
John

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