On Tue 11/Jun/2019 00:41:16 +0200 Scott Kitterman wrote: > On Monday, June 10, 2019 8:07:25 AM EDT Richard C wrote: > >> Presumably other PSDs that aren’t brand new will have this problem too? I’m >> interested to hear whether we’re on our own or not. > > As written, DMARC (RFC 7489) has the option to express different policy for > subdomains (sp= tag). Perhaps we could address this case in PSD DMARC by > leveraging that feature. > > PSD DMARC is the first time there is any DMARC related explicit guidance on > non-existent sub-domains. If we made it a rule that non-existent sub-domains > use the domain level (p=) policy and existent sub-domains use the sub-domain > policy (sp=) then I believe the affect you are after is achievable.
Rather than altering p= and sp=, I'd add an np=, say, for non-existing domains: * It certainly would gather more attention by implementers, * Domain owners could monitor <policy_published> to check it. * It allows the main domain to have a non-reject policy. Best Ale -- _______________________________________________ dmarc mailing list dmarc@ietf.org https://www.ietf.org/mailman/listinfo/dmarc
