I have installed mail server with postfix and dovecot.
My clients use The Bat email client software.
While sending mails, they use tcp port 587 with STARTTLS.
And I disabled tcp port 25 for sending mails in firewall (in server).
Now, they receive mails via tcp port 110 POP3 protocol.
I want to use IMAP or IMAPS for receiving mails for my clients.
And I totally want to disable POP3 protocol.
1) I tried to change port number to 143 for receiving mails in "The Bat", but it cannot receive mails. How can I do it right?
2) Should I reconfigure dovecot for using IMAP/S only?
3) Is my idea is right?
PS: I opened port 143 on my server in firewall.