Mozilla Thunderbird is a free, open-source and cross-platform mail client and news reader for most modern operating systems including, but not limited to, Windows, Linux and Macintosh. It offers some advantages over other mail clients, including junk mail classification. Built from Mozilla code, Mozilla Thunderbird uses Gecko, the most standards-compliant rendering engine in existence.
In addition to the feature set found in Mozilla Mail, Thunderbird has several new features and improvements to make your mail and new experience better.
Click Read More for a changelog
Download: Mozilla Thunderbird 1.07 RC
Screenshot: >> Click here <<
View: Mozilla Thunderbird Homepage
In addition to the feature set found in Mozilla Mail, Thunderbird has several new features and improvements to make your mail and new experience better.
Click Read More for a changelog
What's New In This Release:
- Automated update to streamline product upgrades. Notification of an update is more prominent, and updates to Thunderbird may now be half a megabyte or smaller. Updating extensions has also improved.
- Spell check as you type.
- Built in phishing detector to help protect users against email scams.
- Podcasting and other RSS Improvements.
- Deleting attachments from messages.
- Integration with server side spam filtering.
- Reply and forward actions for message filters.
- Kerberos Authentication.
- Auto save as draft for mail composition.
- Improvements to product usability including redesigned options UI, and SMTP server management.
- Many security enhancements

there's a project for this called ThunderSync but no files have been released yet.
http://minimizetotray.mozdev.org/
Sure, it's better than Trident. Almost all engines are better than Trident when it comes to standards support. But where's the proof that it's the best?
but for normal email usage, thunderbird is correct. If you are power email users, then thebat is the only way to go
Thank you for answering
But anyway great mail client
As for the person who said TheBat! was superior.. well, actually, I cannot try it for I do not run Windows. And it costs money.
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