Started working on an email system with the virtual addresses in a MySQL database.

Also, opened UDP ports 6112 and 30260 to be able to play Company of Heroes:

root@cumulus:/etc/exim4/virtualhosts# ufw allow proto udp from any to any port 6112
Rule added
root@cumulus:/etc/exim4/virtualhosts# ufw allow proto udp from any to any port 30260
Rule added