A plugin for Mozilla Thunderbird to encrypt / sign Email messages with GPG / PGP.
Main Features
* Encrypt/sign mail when sending, decrypt/authenticate received mail * Support for inline-PGP (RFC 2440) and PGP/MIME (RFC 3156) * Per-Account based encryption and signing defaults * Per-Recipient rules for automated key selection, and enabling/disabling encryption and signing * New: OpenPGP key management interface