Sorry, but this is just wrong. DMARC and the tree walk have nothing, and I
emphasize nothing, to do with zone cuts.
I thought a zone cut marked the boundary where an organization delegates
control to another one.
No, it's the place where one set of name servers delegates part of their
DNS tree to another set.
Sometimes the name servers are in different organizations, sometimes they
are not. I have also seen situations where a company hosts DNS for
several of its customers all in the same zone, with no zone cut between
them.
In many cases, that would be the org domain, no?
Sometimes, but you cannot tell, because DMARC and the tree walk have
nothing to do with zone cuts.
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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