in reply to Re^2: How I usually read my mail:
in thread How I usually read my mail:

I don't want to take you away from `mutt`, but there is gpg support for Thunderbird. It's called enigmail:

"Enigmail is an extension to the mail client of Mozilla / Netscape and Thunderbird which allows users to access the authentication and encryption features provided by the popular GnuPG software"

All code is usually tested, but rarely trusted.