> On Apr 11, 2023, at 4:29 AM, Douglas Foster > <dougfoster.emailstanda...@gmail.com> wrote: > > > Neil, I am slowly embracing the position of the Mailing List advocates. > > If mailing lists and all other exceptional situations could be eliminated, > evaluators could mindlessly apply a rule to "block on fail when p=reject". > Similarly, if all evaluators would implement reliable mechanisms for domain > members to request and obtain exceptions for mailing lists and other > exceptional traffic, then domain owners could publish p=reject as soon as all > of their traffic had signatures. Unfortunately, we have a reality that some > highly valued traffic arrives without authentication, and some evaluators do > not provide an effective exception process. This conundrum is aggravated by > filtering products that do not provide administrators with sufficient > exception configuration options. I am content with language that documents > this conundrum. > > The Internet will always be an environment of imperfect information, so the > only viable filtering scheme is one which expects and allows for exceptions. > Additionally, my defenses against impersonation should not be dependent on > the domain owner's policy statement. Any allowed message is implicitly > assumed to be free of impersonation, but assumptions are dangerous. It is > my job to replace guesswork with certainty based on research. As indicated > earlier, this can be done. Using DMARC, SPF, and local policy, I am at 100% > verified for MailFrom, and 97% verified for From. Mailing lists have > nothing to fear from my filtering and I have nothing to fear from p=none. > > In short, we need smarter filtering. > > Doug Foster
Mr. Foster, you seem (though I could be wrong) to be talking about inbound where you have complete control but for policies set in domains sending outbound, how would filters resolve the problem? We have little control over outbound. Threat actors will Phish wherever the phishing is good. I guess I was hoping that security could be the top priority but it’s likely naïveté. I can see the I trade offs. You piss off too many people and you end up with a standard nobody wants to use. Neil _______________________________________________ dmarc mailing list dmarc@ietf.org https://www.ietf.org/mailman/listinfo/dmarc
