It appears that Alessandro Vesely <ves...@tana.it> said: >On Sun 19/Dec/2021 21:42:16 +0100 Scott Kitterman wrote: >> If the domain owner has suggested that you reject mail from a sub-domain >> that has none of A, AAAA, or MX records, why would you not do that?
>Then it turns out that one can also define DMARC record at some non-existing >sub domains, possibly as an alternative to using np=... Now this begins to >look puzzling. Only if you misunderstand the way the DNS works. If there is a txt record for _dmarc.foo.bar, that means the name foo.bar exists. It may not have any records, but it exists. That's the difference between a DNS NXDOMAIN response for a non-existent domain and NOERROR for one with no records. The difference is not an accident, not a mistake, and is not going to change. See for example RFC 8020. >The reason to introduce np= was to select domains that really don't exist. >Why >don't we stick to that definition? Yes indeed, why don't we, and end this pointless argument? R's John _______________________________________________ dmarc mailing list dmarc@ietf.org https://www.ietf.org/mailman/listinfo/dmarc
