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Re: [ietf-smtp] MTA-MTA SMTP and TLS-on-connect

2020-04-26 15:37:30
In article <01RK5KUREEZA000058(_at_)mauve(_dot_)mrochek(_dot_)com> you write:
should we think about technical means to facilitate the latter?

Absolutely not. Relaying mail is complicated enough already; adding another
port and DNS lookup to the mix and all the associated failure modes consistutes
a huge cost with no real benefit.

Agreed, the extra overhead of HELO and STARTTLS is not important, and the net is
already overoptimized for mail on port 25.

I am reasonably sure that if we didn't already have port 465 in
addition to 587, nobody would invent it.

John Levine, johnl(_at_)taugh(_dot_)com, Primary Perpetrator of "The Internet 
for Dummies",
Please consider the environment before reading this e-mail.

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