Heho, I looked at that recently; See the SMTP paper recently published [1], and enforcing TLS certainly is indeed on the rise, and at least one of the privacy mail providers at least allowed their users to opt-in to TLS-Only sending for their mails.
We are currently also setting up a website to run our tests against one's own ESP/Setup (without me having to dig results out of the logs ;-)), which I'll hopefully be able to share soonish. With best regards, Tobias [1] https://www.usenix.org/system/files/atc22-holzbauer.pdf -----Original Message----- From: mailop <[email protected]> On Behalf Of Slavko via mailop Sent: Wednesday, 23 November 2022 00:13 To: [email protected] Subject: Re: [mailop] tls certificates Dňa 22. novembra 2022 21:00:36 UTC používateľ "Gellner, Oliver via mailop" <[email protected]> napísal: >Also the number of MTAs that require STARTTLS is not increasing based on my >experIence. I haven’t seen a large ESP which enforced TLS for all incoming and >outgoing connections yet. Are you aware that even change from 1 to 2 means grow? I didn't write if requiring TLS is in most of servers, nor that is required by a lot of servers, but i see grow in logs (over time), where host try STARTTLS and when it fails, they go away without fallback to plain. I inspect them mostly only by checking its hostname, and as they are not "important" for me, i mostly ignore them. But i remember one from DE, which was "important" and required exception from my side. regards -- Slavko https://www.slavino.sk/ _______________________________________________ mailop mailing list [email protected] https://list.mailop.org/listinfo/mailop _______________________________________________ mailop mailing list [email protected] https://list.mailop.org/listinfo/mailop
