Re:TurboTLS: TLS connection establishment with 1 less round ...
by mananaysiempre on Tuesday February 14, 2023 @02:38PM
(#34794766)
Not sure about real-world statistics, but the current IETF position is that SMTP STARTTLS for mail submission (not transport) is to be phased out in favour of “implicit” SMTP-over-TLS with no cleartext portion, due in part to the former being an implementation minefield[1].
[1] https://datatracker.ietf.org/doc/html/rfc8314#appendix-A