Standalone POP3, IMAP4 and Usenet client by the Mozilla Foundation. Open source and multi-platform, it features intelligent Bayesian spam filters, a built-in spell checker and extension support.
Official press release covering the launch of version 1.0.
Messages about bugs, features, builds, and the program in general.
Detailed installation guides and tutorials for Thunderbird
Weblog about developments in the nightly builds.
Official site. Open source cross-platform email and Usenet client based on Mozilla code. Features intelligent spam filters, built-in RSS reader, and quick search.
Has a variety of troubleshooting articles that help install, resolve and configure Thunderbird.
In depth history and information
Full featured version for portable devices such as USB drives
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