On Thu 28/Jul/2022 20:24:35 +0200 Scott Kitterman wrote:
If this process does not determine the Organizational Domain, then
the Organizational Domain is the starting domain.
The last paragraph is a puzzle. If a tree walk retrieved a DMARC record, then
there must exist a domain with a record with the fewest number of labels. It
is not needed any more. Let's replace it with:
For Tree Walks that retrieved no DMARC record, the Organizational Domain is
undefined. No alignment can be established in such cases.
No. That's incorrect. We have discussed this exact point multiple times in
the last several weeks. I conclude that I'm incapable of communicating this
adequately and will leave it to someone else.
Yes, I remember the discussions, and some example cases where it happened.
Yet, reading again step 3:
3. Otherwise select the record for the domain with the fewest number
of labels. This is the Organizational Domain and the selection
process is complete.
How can it possibly happen, in real or imaginary cases, that the org domain is
not selected after this step?
The examples were something like psd.example.com, whose record with psd=y was
discarded on step 2. If example.com and com have no records, the record for
the domain with the fewest number of labels is still psd.example.com, so the
process concludes by step 3.
I don't recall other examples, except the invalid ones, like .com, which I
imagined before getting that having retrieved a DMARC record was a requirement
for the input tree walk.
Best
Ale
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