Release Notes - Thunderbird 0.9
Thunderbird is a full-featured e-mail, RSS and newsgroup client that makes e-mailing safer, faster and easier than ever before. More information about Thunderbird is available.

Given the maturity of the underlying Mozilla code, Thunderbird is very usable as your primary e-mail client. However, it is considered a Technology Preview, and as such is assumed to have defects. See the License Agreement for more information.

These release notes cover what's new, download and installation instructions, known issues and end user support / feedback for the Thunderbird 0.9 release.

Please read these notes and the bug filing instructions before reporting any bugs to Bugzilla. We want to hear your feedback about Thunderbird. Please join us in the Mozilla Thunderbird Support forum, kindly hosted by MozillaZine.

don't know if anyone else uses it but it's definitely my email client of choice.