On Wed, Jan 6, 2016 at 4:56 AM, Moritz Bartl moritz@torservers.net wrote:
Just as a data point, I don't see much scanning/abuse regarding SMTPS (465)
SUBMISSION (567) is what is used these days as relay to send mail. 465 is a legacy bug. 25 fronts your @address. See wikipedia for more info.
or IMAPS (993).
POP3S (995) still holds significant userbase even though it could be considered a subset of what imap can do.