On Fri, Jun 16, 2023 at 10:11 AM Jaroslaw Rafa via mailop <mailop@mailop.org> wrote:
> Dnia 16.06.2023 o godz. 09:31:58 Todd Herr via mailop pisze: > > Yes, the DMARC protocol does describe the search for the organizational > > domain for the RFC5322.From domain in an email message. > > > > It doesn't rely on the "_domainkey" hostnames (that's DKIM), but it does > > currently rely on the Public Suffix List to determine the organizational > > domain in cases where there is no DMARC policy record published for the > > RFC5322.From domain. > > Well, in reality it doesn't use PSL. > > [snip] > > So at least one (and important one, given the size of this mail service) > implementation of DMARC does not use the PSL. > Those are two different statements, though. The current DMARC protocol ( https://datatracker.ietf.org/doc/html/rfc7489#section-3.2) specifies acquiring a public suffix list as the first step in determining an organizational domain. Your example demonstrates an implementation of DMARC that may not be following the published protocol, but that's different from saying DMARC doesn't use the PSL. -- *Todd Herr * | Technical Director, Standards & Ecosystem *e:* todd.h...@valimail.com *p:* 703-220-4153 *m:* 703.220.4153 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.
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