Oracle Linux/Simple IMAP Server
From r00tedvw.com wiki
Overview
Dovecot for POP/IMAP
Postfix for SMTP
Setup SSL
Just going to use a simple self-signed cert.
sudo openssl req -x509 -nodes -days 365 -newkey rsa:2048 -keyout /etc/ssl/private/mail.key -out /etc/ssl/certs/mailcert.pem