Doing a nmap on my server, I get this:
25/tcp open smtp
80/tcp open http
110/tcp open pop3
143/tcp open imap
465/tcp open smtps
587/tcp open submission
993/tcp open imaps
995/tcp open pop3s
- I would like to use only secure connections, thus only smtps, imaps and pop3s. Could I disable the unsecured protocols, and expect things to work? What if I'm trying to send an e-mail to a server which doesen't have pop3s?
- Why is
submission
there? It belongs to Postfix, but what it's his purpose? Isn't Postfix using only smtp/s? - I'm using Roundcube to read my e-mail, which is hosted on the same server with Postfix and Dovecot. I'm not using any other e-mail clients. How can I disable
imap
andimaps
from the public? I want only Roundcube to use it.