Enigmail is a security extension to Mozilla Thunderbird and Seamonkey.
It integrates the renowned OpenPGP standard provided by GnuPG.
Sending and receiving encrypted and digitally signed email gets just
simple using Enigmail.
* Note:
* I can't get this to work on NetBSD 5.99.11 amd64, thunderbird hangs
* regularly. Perhaps this is related to:
* https://www.mozdev.org/bugs/show_bug.cgi?id=19263