On Wed 16/Jun/2021 20:02:21 +0200 John Levine wrote:
Let's close ticket #112 and stop.
I agree that the definition given in the PSD is clear enough:
For DMARC purposes, a non-existent domain is a domain for which there
is an NXDOMAIN or NODATA response for A, AAAA, and MX records. This
is a broader definition than that in [RFC8020].
However, by that definition a domain with a Null MX [RFC7505] is an existent
domain for DMARC purposes. Perhaps this apparent contradiction could be noted
by adding a sentence somewhere, for example:
Even though the bare existence of a domain does not entail that it can send
or receive email, the presence or absence of the relevant DNS RRs determines
which policy between sp= and np= is applicable. If a DMARC record is found
for a domain that would be non-existent by the above definition, the p=
policy defined there is still the one to be applied.
Would that add clarity?
Best
Ale
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