Le 22 avr. 2022 à 01:50, Jeremy Ardley <jeremy@ardley.org> a écrit :


On 22/4/22 7:44 am, alice@coakmail.com wrote:
On 22/4/22 7:25 am, alice@coakmail.com wrote:


Thanks. I will give a try.
after enabling SSL, can I disable port 143 entirely?

Probably a bad idea. Many clients use STARTTTLS on port 143 rather than TLS on port 993


While it's true for SMTP, my experience is that IMAP clients prefer imaps in 993 instead of STARTTLS. 

I have a server with only port 993 opened, and almost never had any issue with client configuration.