On Tue 25/Jan/2022 20:39:11 +0100 Murray S. Kucherawy wrote:
On Tue, Jan 25, 2022 at 11:26 AM John R Levine <[email protected]> wrote:
On Tue, 25 Jan 2022, Murray S. Kucherawy wrote:
will get the same result. It also occurs to me that in the absence of
a PSL-like thing, the idea of an organizational domain is no longer
useful.
Aren't we basically trying to identify the same thing, just in
a different (and more robust) way? >>
Yes, but that leads to the question of whether the org domain is useful on
its own or it's just a way to figure out alignment. I think it's the
latter, dunno what other people think.
It's an interesting thought exercise at least. We should be sure to give a
decent treatment to this in the "differences since RFC 7489" part of the
document.
The concept of Organizational Domain is a key concept, as it is easy
to understand, based on intuitive set theory ideas. With respect to
earlier SPF experience, which required tagging each and every domain
name in an organization, it is an invaluable progress.
Replacing it with a difficult graph-theoretical argument is going to
make the notion of alignment much more difficult to explain. The mere
fact that adding a DMARC record can change alignment properties turns
such a simple operation into something that requires an extensive
analysis before it can be carried out.
If we drop Organizational Domain we're probably better off dropping
alignment as well. We're worsening DMARC in that case.
Best
Ale
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