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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