On Sat, 6 Apr 2024, Scott Kitterman wrote:
As a side effect of the switch to the tree walk approach in DMARCbis, this is no longer true. For any subdomain without a DMARC record, the domains above it in the tree are also checked, so you can specify a different policy/ reporting address for groups of subdomains below the org domain (as long as you don't get past the max N value in length).
Huh, what? Whatever the tree walk finds is by definition the org domain. It's the same whether you're using it to check alignment or send reports.
I can articulate that N=5 is based on the longest email relevant entry in the current PSL. Why N=8 and not N=7 or N=9?
Seth says there are people who need N=8 but for business reasons he can't tell us who they are. I'm not thrilled about that but I see little downside to bumping the number up to 8.
Regards, John Levine, jo...@taugh.com, Primary Perpetrator of "The Internet for Dummies", Please consider the environment before reading this e-mail. https://jl.ly _______________________________________________ dmarc mailing list dmarc@ietf.org https://www.ietf.org/mailman/listinfo/dmarc
