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
submissionthere? 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
imapsfrom the public? I want only Roundcube to use it.