Quick follow-up: I just looked at my scans for duplicates and found 8670 domain names with duplicates (0.007% of total DMARC records)
'dmarc-srequest': 5551 'dmarc-request': 1651 'dmarc-auri': 657 'dmarc-aspf': 292 'dmarc-percent': 174 'dmarc-furi': 129 'dmarc-fo': 95 'dmarc-ainterval': 59 'dmarc-rfmt': 36 'dmarc-adkim': 26 Looking quickly at the records that fail the analysis, 5339 have the same record and seem to belong to the same organization (contacted) that offers email services. The records failing the semantical analysis contain an additional 'dmarc-srequest' ('sp=none'). I do not know if this kind of data is relevant for this mailing list. If not, please let me know. Regards, Olivier Hureau De: "Alessandro Vesely" <ves...@tana.it> À: "dmarc" <dmarc@ietf.org> Envoyé: Mardi 25 Juillet 2023 13:39:17 Objet: Re: [dmarc-ietf] What happens when the DMARC record contains two identical tags? On Mon 24/Jul/2023 18:17:10 +0200 Murray S. Kucherawy wrote: > On Mon, Jul 24, 2023 at 9:13 AM OLIVIER HUREAU > <olivier.hur...@univ-grenoble-alpes.fr> wrote: > >>> If you want more than just the ABNF to defend that position, have a >>> look at the DKIM RFC, from which this syntax was cloned; it says: >> >> Then wouldn't it make sense to add this specification to DMARC-bis? > > Can't hurt. +1, the reference in Section 5.3 is a bit vague. For a possible expansion: OLD DMARC records follow the extensible "tag-value" syntax for DNS-based key records defined in DKIM [RFC6376]. NEW DMARC records follow the extensible "tag-value" syntax for DNS-based key records defined in DKIM [Section 3.2 of RFC6376], which defines parser behavior when tags are unrecognized, repeated, case-sensitive and the like. jm2c Ale -- _______________________________________________ dmarc mailing list dmarc@ietf.org https://www.ietf.org/mailman/listinfo/dmarc
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