Email at Digital Ocean

Turns out setting up an email server at Digital Ocean is pretty straight forward.  Here’s my recipe:

1. Follow this Digital Ocean tutorial to set up postfix.
2. Poke a hole in the firewall for mail to get through with sudo ufw allow mail (not sure why the Digital Ocean tutorial didn’t have this critical step;  props to this other recipe.)
3. Add an MX record on the Digital Ocean DNS control panel.
4. Add the email addresses to forward to the virtual aliases file.

No muss, no fuss.  Nice!