--On Monday, September 14, 2020 17:38 -0700 Brandon Long
Yes, I should point out that at Google, we do multiplex
multiple connections between a proxy frontend and our actual
smtp servers, but we don't do it at the command level, but at
the stream level, which is a much simpler mechanism for
integration and utility across different protocols (we do this
with imap, pop, xmpp, and probably others, on top of the
various types of HTTP).
I would be mildly astonished if you were doing anything else.
It raises some questions that I periodically worry about but
none of them are specific to SMTP or even email more generally.
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