Re: [dmarc-ietf] Description of 'n' value for the 'psd' tag AND/OR Clarify the Tree Walk

[Alessandro Vesely <[e-mail]>]

On Tue 16/Apr/2024 23:17:44 +0200 Todd Herr wrote:
> Colleagues,
> 
> DMARCbis currently describes the value of 'n' for the 'psd' tag in a policy 
> record as follows:
> 
>     The DMARC policy record is published for a PSD, but it is not the
>     Organizational Domain for itself and its subdomain. There is no need to put
>     psd=n in a DMARC record, except in the very unusual case of a parent PSD
>     publishing a DMARC record without the requisite psd=y tag.
> 
> I don't think this is entirely accurate, especially the second sentence ("no 
> need ... except in the very unusual case"), and here's why. Either that, or the 
> description of the Tree Walk needs to be changed.


The correct text would be something like so:

     The DMARC policy record is published for a domain which is the
     Organizational Domain for itself and its subdomains (up to one which
     in turn publishes a psd= tag with value not u.)  There is no need to
     put "psd=n" in a DMARC record, except in the very unusual case of a
     parent PSD publishing a DMARC record without the requisite psd=y tag.
     (A parent PSD not publishing any DMARC record is fine.)

Note that intermediate records are discarded.


Best
Ale
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