On Sun, 31 Jul 2022, Murray S. Kucherawy wrote:
You could make the argument that you "usually" find DMARC records at zone
cuts, but that's relying on convention or happenstance rather than a
standards-quality framework.
Right, we went through all of this in the failed DBOUND discussion.
If it were true, which it is not, that zone cuts always indicate different
management, and that every change of mangagement has a zone cut, we would
not be having this discussion because it is trivial to find the zone cuts.
But since it is not, we have to do it other ways like the PSL for web
cookies and the tree walk for DMARC.
I have to say I am somewhat concerned that people are trying to design the
way DMARC uses the DNS but do not appear to understand some fairly basic
things about the way the DNS works.
Regards,
John Levine, jo...@taugh.com, Taughannock Networks, Trumansburg NY
Please consider the environment before reading this e-mail. https://jl.ly
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