Secure email with Thunderbird and Enigmail
Thunderbird offers several options for secure email, and the GnuPG-based Enigmail encryption add-on provides an additional layer of protection.
The small-footprint, user-friendly Thunderbird email client is rapidly gaining ground with the Internet community. Most Linux distributions include Thunderbird  by default. The Mozilla developers have ready-to-run versions for most current systems on their website. Debian does not have an official package for the current version, but test versions are available from the maintainer’s repository . With the recent Thunderbird pre-release version 0.9, the bird is almost ready for flight with an impressive collection of convenient security features. In this article, you’ll learn some of the finer points of Thunderbird security.