Before we picked 5, we looked and that's sufficient to capture all the boundaries. It's not a problem. This was discussed on the list, I don't recall when.
Scott K On Tuesday, March 22, 2022 9:55:56 PM EDT Douglas Foster wrote: > Suppose a FROM address domain has the lower-bound of 5 segments, and that a > verified DKIM signature exists using a child domain somewhere below that, > perhaps with 7 segments. > > Are the names automatically considered to be aligned, without a tree walk, > because a private registry boundary will not occur below level 5? Or > should a scope-limited tree walk be performed between the child domain and > the FROM domain to be sure that no boundary exists? > > Doug > > On Mon, Mar 21, 2022 at 4:50 PM <[email protected]> wrote: > > A New Internet-Draft is available from the on-line Internet-Drafts > > directories. > > This draft is a work item of the Domain-based Message Authentication, > > Reporting & Conformance WG of the IETF. > > > > Title : Domain-based Message Authentication, Reporting, > > > > and Conformance (DMARC) > > > > Authors : Todd M. Herr > > > > John Levine > > > > Filename : draft-ietf-dmarc-dmarcbis-06.txt > > Pages : 62 > > Date : 2022-03-21 > > > > Abstract: > > This document describes the Domain-based Message Authentication, > > Reporting, and Conformance (DMARC) protocol. > > > > DMARC permits the owner of an email author's domain name to enable > > verification of the domain's use, to indicate the Domain Owner's or > > Public Suffix Operator's message handling preference regarding failed > > verification, and to request reports about use of the domain name. > > Mail receiving organizations can use this information when evaluating > > handling choices for incoming mail. > > > > This document obsoletes RFC 7489. > > > > The IETF datatracker status page for this draft is: > > https://datatracker.ietf.org/doc/draft-ietf-dmarc-dmarcbis/ > > > > There is also an HTML version available at: > > https://www.ietf.org/archive/id/draft-ietf-dmarc-dmarcbis-06.html > > > > A diff from the previous version is available at: > > https://www.ietf.org/rfcdiff?url2=draft-ietf-dmarc-dmarcbis-06 > > > > Internet-Drafts are also available by rsync at rsync.ietf.org: > > :internet-drafts > > > > _______________________________________________ > > dmarc mailing list > > [email protected] > > https://www.ietf.org/mailman/listinfo/dmarc _______________________________________________ dmarc mailing list [email protected] https://www.ietf.org/mailman/listinfo/dmarc
