Dave Crocker writes: > On 3/19/2015 12:52 PM, Murray S. Kucherawy wrote: > > And since the From field is the only one users really see every time, > > I'm not sure that declaring and supporting yet another > > no-seriously-this-is-the-author field would be of benefit. > > > I'd like to try to get us to phrase this differently. > > In particular, it does not matter what user's 'see'. The information is > processed by a filtering agent, independent of the user. > > So what matters is that the From: field domain is the > only field certain to be provided by the author. > > Everything about DMARC derives from the certainty of that presence.
Except for the very existence of DMARC, which was primarily motivated by phishing and "recommended-by-friend spam", which depend on what the recipient sees, and the recipient's association of trustworthiness with the message's apparent author. So no, the filtering agents don't really matter to DMARC as far as I can see. What matters to DMARC is when inauthentic From addresses get past the filtering agents. At that point DMARC intervenes and (optionally at the domain owner's request) interdicts inauthentic addresses in From:. Steve _______________________________________________ dmarc mailing list [email protected] https://www.ietf.org/mailman/listinfo/dmarc
