Mozilla Thunderbird is a redesign of the integrated Mozilla App-Suite mail component. Our goal is to leverage much of the existing functionality of that product to produce a stand-alone mail application that is simple and extensible. The Mozilla Thunderbird Project website has more information.

The focus of this second milestone release is to improve on the stability, performance, and polish of the promising 0.1 release. While there is much more work yet to do, the developers are excited about recent progress and are anxious to share their latest efforts with the community. Enjoy!