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Resources

Release Notes
Find what's new in this release.
End-user documentation
Documentation, information, downloadable themes, extensions, tips, etc.
FAQ
Answers to common questions for users of Mozilla Thunderbird.
Intro. to Thunderbird
Article series for beginner users.
Extensions
Make your messaging client as powerful as you want by downloading extensions.
Themes
Personalize Mozilla Thunderbird with a large collection of downloadable themes.

Mozilla Thunderbird
This surprisingly full-featured open-source program is a snap to use...
- PC World
...a killer app for users who deal with massive amounts of email
- Linux Magazine
A screenshot of the Mozilla Thunderbird messaging client while reading messages

Technology Preview:
Mozilla Thunderbird - Milestone 0.6

The e-mail and newsgroup client for 2004 and beyond.

Thunderbird makes emailing safer, faster and easier than ever before with the industry's best implementations of features such as intelligent spam filters, a built-in spell checker, extension support, and much more.

We designed Thunderbird from the ground up to boost users' productivity. That's why we've made it easier for you to simply get your work done, without the hassles of wading through advertisements and other junk mail. Emailing should be efficient and convenient. We make that possible using fully open and industry leading standards. Read on to find out more about the reasons why you should use Thunderbird as your mail and news client.

Smartest Way to Stop Junk Mail

Thunderbird provides the most effective tools for detecting junk mail. Our tools analyze your e-mail, and identifies those that are most likely to be junk. You can automatically have your junk mail deleted or you can put in a folder you specify, just in case you like reading junk mail.
Read More...

Your Mail, Your Way

View your e-mail the way you want it. Access your e-mail with Thunderbird's new three-column view. Customize your toolbar, change its look with themes, and use Mail Views to quickly sort through your e-mail.
Read More...

Safe and Secure

Thunderbird provides enterprise and government grade security features such as S/MIME, digital signing, message encryption, support for certificates and security devices.
Read More...

Packed with Features

Thunderbird gives you IMAP/POP support, support for HTML mail, labels, quick search, smart addressbook, return receipts, advanced message filtering, LDAP address completion, import tools, powerful search, and the ability to manage multiple e-mail and newsgroup accounts.
Read More...

Unlimited Features

Thunderbird lets you add additional features as you need them through extensions. Extensions are a powerful tool to help you build a mail client that meets your specific needs.
Read More...


Mozilla Thunderbird is a Technology Preview.

This software may work well enough to be relied upon as your primary messaging client as it is based off a stable Mozilla 1.6 architecture. However, Mozilla Thunderbird is still a preview release, and therefore several features may not be complete.

Support and Discussions

Need support? Ask your question at the technical support forum. Thunderbird Specific Forums are also available for general discussion.

For frequently asked questions, tips & tricks, downloadable themes and extensions, visit Mozilla Thunderbird Help.

For developers

The development pages cover source code, developer resources, roadmap, etc.