Browse - Computer Tips - How can I encrypt my email?
Q. How can I encrypt my email?
A. Use GPG or certificates.
Install GPG and the Enigmail plugin for Thunderbird
Seems Hushmail is a bad choice
There's always spammimic
If you are running a mailserver you can add TLS
which will encrypt mail between servers.
By the way, its almost certain that mail is being monitored