Thunderbird is a redesign of the Mozilla mail component. Our goal is to produce a cross platform stand alone mail application using the XUL user interface language. Our intended customer is someone who uses Mozilla Firebird (or another stand alone browser) as their primary browser and wants a mail client based on mozilla that "plays nice" with the browser.

What's New In RC1:

Talkback is a part of the the builds for all 3 platforms. Talkback is a tool that generates crash report data which helps us measure the stability of the product and figure out where crashes are happening.

Thunderbird 0.7 bits use the new Extension Manager developed for Firefox. When installing a theme or extension, it must be written to the new EM APIs that Ben Goodger has document for Firefox or it will not install.

Static builds for all platforms. Yielding a smaller disk size and a really nice performance win across the board. OS X bits also use pre-binding now giving yet another big performance boost.

Windows installer uses 7-zip compression for a new download size of only 5.9MB (5.7 without talkback)! Woo Hoo!

Multiple Identity UI for creating multiple identities for a given account.

New inline vCard UI

New profile manager including new profile manager UI.

Download Thunderbird 0.7 RC1