Port 465 is opened in master.cf. The difference with port 587 is
that port 465 needs "-o smtpd_tls_wrappermode=yes".
You need to "postfix reload" after editing master.cf.
Just to be sure.....
Will this break the 587 connection?
Nope. smtps (port 465) and submissions (port 587) are two separated
services defined in master.cf. Their use will not affect each other.
regards.
Hua
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