> -----Original Message----- > From: dmarc <[email protected]> On Behalf Of Dave Crocker > Sent: 23 June 2020 19:49 > To: IETF DMARC WG <[email protected]> > Subject: [dmarc-ietf] What if... Sender: > > [...] > So if Sender: wouldn't be as useful as From:, why not? >
Hi Dave, I don't think this allows some of the important automated filtering which alignment on 'From' does (putting the user-importance can of worms about From aside for a moment, though not conceding it). Specifically, alignment on 'From' allows automated checks against addresses of known, trusted contacts from addressbooks - that an email is authenticated for the domain from the addressbook, and hence likely to actually be from the contact (similarly, it can be used for trusted/known-domains eg same-domain). This can be used for automated scoring/filtering to prevent a malicious (spear)phishing email from appearing in an inbox. If the authentication is of a value which isn't related to the entry in the addressbook, I don't see how this kind of checking/filtering can be done, and so wouldn't be as useful. Unless there's a way I've missed? David This information is exempt under the Freedom of Information Act 2000 (FOIA) and may be exempt under other UK information legislation. Refer any FOIA queries to [email protected]. All material is UK Crown Copyright © _______________________________________________ dmarc mailing list [email protected] https://www.ietf.org/mailman/listinfo/dmarc
