This is about Section 3.8. Non-existent Domains For DMARC purposes, a non-existent domain is a domain for which there is an NXDOMAIN or NODATA response for A, AAAA, and MX records. This is a broader definition than that in [RFC8020].
My argument is that that A/AAAA/MX has no useful relevance to determining whether the RFC5322.FROM address of a message should be evaluated based on SP or NP. NP is described as testing "non-existent", rather than "possibly able to receive mail". We need a test that evaluates whether the domain exists or not, and is maximally protected from false positives caused by host names and wildcards. If this group is convinced that A/AAAA/MX is meaningful for the distinction between SP and NP, I am asking someone to provide the justification and define the algorithm. Right now I have seen neither. On Thu, May 6, 2021 at 9:52 PM Seth Blank <seth= [email protected]> wrote: > On Thu, May 6, 2021 at 18:47 John Levine <[email protected]> wrote: > >> It appears that Douglas Foster <[email protected]> >> said: >> >My perception has been that NDRs are widely ignored even when they are >> >sent. Is your experience different? >> >> Yes. We are not going to rewrite RFC 5321 here. Please stop. > > > Doug, I don’t understand what textual consideration within the DMARCbis > documents you are discussing. > > Please reference the text in question and your proposed modifications, or > move on to a topic which is material to driving this bis documents to > completion, which is our current work item. > > Seth, as Chair > -- > > *Seth Blank* | VP, Product > *e:* [email protected] > *p:* 415.273.8818 > > This email and all data transmitted with it contains confidential and/or > proprietary information intended solely for the use of individual(s) > authorized to receive it. If you are not an intended and authorized > recipient you are hereby notified of any use, disclosure, copying or > distribution of the information included in this transmission is prohibited > and may be unlawful. Please immediately notify the sender by replying to > this email and then delete it from your system. > _______________________________________________ > dmarc mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/dmarc >
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