Re: [dmarc-ietf] Nonexistent Domain Policy was: Re: Working Group Last Call: draft-ietf-dmarc-psd

"Kurt Andersen (b)" <> Wed, 17 July 2019 21:55 UTC

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From: "Kurt Andersen (b)" <>
Date: Wed, 17 Jul 2019 14:55:12 -0700
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To: John Levine <>
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Subject: Re: [dmarc-ietf] Nonexistent Domain Policy was: Re: Working Group Last Call: draft-ietf-dmarc-psd
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On Wed, Jul 17, 2019 at 2:40 PM John Levine <> wrote:

> In article <CABuGu1rSyifv0B9RtD3_R2ex-sh+nVrh4Q3H=kU=
>> you write:
> >Firstly, I'm a little concerned with the sentence which says 'Note that
> >"np" will be ignored for DMARC records published on subdomains of
> >Organizational Domains and PSDs due to the effect of the DMARC policy
> >discovery mechanism described in DMARC [RFC7489] Section 6.6.3.' I don't
> >think that is an accurate portrayal. ...
> I think what it means is that if there's a DMARC record on a
> subdomain, it won't see any np= in the org domain or the PSD.  I agree
> the wording could be better.  I also don't understand what possible
> meaning an np= on a subdomain record would have.

np on a subdomain doesn't make any sense; np on an org domain would. I
think that just omitting the "and PSDs" would solve my concern unless the
use case of concern has to do with PSD subdomains that are still in the
public space. It's a question of distinguishing between LPD (longest public
domain) and PSDs in general.