Welcome to Enigmail
Enigmail is a free and open source security extension to Mozilla mailclients such as Thunderbird and SeaMonkey. It allows you to write and receive email messages digitally signed and/or encrypted with the OpenPGP standard, in a simple and easy way. The home page of the project is https://enigmail.net from which you will be able to download Enigmail.
This web page contains the latest version of the end user documentation for Enigmail. Its content originates from a Wiki that was unfortunately closed. We are currently in the process of migrating the content to integrate it better into the Enigmail web site.
Setting up Enigmail