The correct IMAP port: 993 didn't work, I've already checked if the port is open or not with netcat and indeed it is. Although it works with the default port (143). I suggest changing the README.md documentation on (on line 104) to the correct ports. Alternatively, you can set up the email server to set the IMAP port to 993. On Another note, Some Application doesn't default the connection security to STARTTLS.

On K-9 Mail (Android) I had to tinker for a while before I ended up with the correct information. In the case of Thunderbird, it does automatically set the ports, etc. It's better to have this on the documentation for easy user setup, just to make sure.

Replaced 933 for 993, the correct port for IMAP.

documentation changes

Literally added one letter

Technically Postfix is responsible for sending *and* receiving mail between *your server and other SMTP servers* (Mail Transfer Agents). Dovecot is only so you can view your mail in email clients on your computer instead of server, which is not really *receiving*. You can have a perfectly functional email system with no IMAP/POP server at all, you'd just have to read your email over SSH or whatever

Typos + other tiny corrections, is it "honestly have" or "honestly don't have" preference towards vultr? Tried to guess...