Thunderbird 3 Release Candidate is a preview release of the next major version of Thunderbird and it is being made for testing purposes only.

Changelog:
Thunderbird 3 is based on the Gecko 1.9.1.5 platform including some major re-architecting to provide improved performance, stability, web compatibility, and code simplification and sustainability. There are over 100 changes in this release, many laying the groundwork for future changes.

Program Information Category: Internet and communication Type: Free Version: 3.0 RC1 Size: 8.57MB Works on: Windows, Linux, Mac Product page: here