Folks that deploy wildcard MX usually have a reason. It may not be a reason that makes sense to others, but there's usually a reason.
In those cases, np won't work. We should perhaps spell that out in the text a bit more clearly. On Fri, May 7, 2021 at 5:13 PM John Levine <jo...@taugh.com> wrote: > It appears that Douglas Foster <dougfoster.emailstanda...@gmail.com> > said: > >Is there a query or collection of queries that can ensure that we only > >accept results from the identifier domain and not from the parent? > > This is a meaningless question. DNS queries ask about a specific name > and RRTYPE and you get back the answer for that name and RRTYPE. > > >*Wildcard DNS:* > > > >Wildcard entries create intentional ambiguity. > > That is simply false. Wildcards are perfectly well defined. I have > occasionally found wildcard MX records to be useful. > > I have taken another look at ticket #111 and found that the questions > it asks misunderstand both the way that the DNS works and the way that > SMTP has used the DNS since RFC 1123 over 30 years ago. > > Please close this ticket, there is nothing to fix. > > R's, > John > > _______________________________________________ > dmarc mailing list > dmarc@ietf.org > https://www.ietf.org/mailman/listinfo/dmarc >
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