On Tue, 28 Apr 2020, Michael Thomas wrote:
It also confirms that it's used for submission, not SMTP, so I remain
baffled about what if any point you are trying to make.
I made no mention of what port I was referring to. It's not exactly news that
SMTP-AUTH is gernerally used on the submission port, so likewise I have no
idea what if any point you are trying to make.
IF a client connects to a server on port 25, that's SMTP. EXCEPT that if
the client then authorizes, it turns into submission, even though it's not
on port 587.
So-called SMTP-auth has nothing to do with identifying who might be
responsible for an incoming SMTP message. It's only useful for keeping
your own users in line.
Regards,
John Levine, johnl@xxxxxxxxx, Taughannock Networks, Trumansburg NY
Please consider the environment before reading this e-mail. https://jl.ly
