On Tue, 26 Nov 2019, Wesley Peng wrote:
on 2019/11/26 17:02, Matus UHLAR - fantomas wrote:I would set up port 465 also. Note that TLS on 465 is implicit, while on 587 isexplicit, so it's easier to allow unencrypted connections by a mistake on 587.587 is also used for StartTLS, am I right?
Yup, that's what Matus meant with "explicit". Connection starts in clear text and is then (explicitly :) "upgraded" to TLS.