Thunderbird makes email better for you, bringing together speed, privacy and the latest technologies. Focus on what matters and forget about complexity.

Is Thunderbird free?

Yes, Mozilla Thunderbird is free and open source. You can use it for personal and commercial use. However, Mozilla is open to donations in order to keep improving the app.

Does Thunderbird let users make a local copy of my messages?

Yes, Thunderbird will keep a copy of all your messages on your computer by default. You can also create a local backup of your messages or download them from your server whenever you need it.

Can Thunderbird replace Outlook?

For general email use, yes, Thunderbird can be a suitable replacement for Outlook. Those that require better integration with Microsoft Office and Exchange will be more satisfied with Microsoft Outlook. Additionally, Thunderbird’s interface may not be as polished as Outlook’s.

How many email accounts can I have with Thunderbird?

Thunderbird has no limitation on the number of email accounts users can add to the app.

What mail services does Thunderbird support?

Thunderbird supports most mailing services that synchronize items through the IMAP protocol or download messages through the POP3 protocol. The application also supports synchronization for MS Exchange and Outlook.com accounts. Thunderbird supports Gmail, iCloud, Outlook.com, IceWarp, Microsoft Exchange, Yahoo, AOL, GMX, Kerio and more.

Features

Mail Account Setup Wizard

Prior to this feature you had to know your IMAP, SMTP, and SSL/TLS settings. Now all you need to provide is your name, email address, and password and the email account set up wizardry will check our database and find the email settings for you.

Personalized Email Addresses

Ever dreamed of having a personalized email address (such as “dad@thesmithfamily.com”) for you, your family or your business? Thunderbird makes this easy – you can sign up for a new email address within Thunderbird, and it will all be set up automatically for you ready to send and receive.

One-click Address Book

One-click Address Book is a quick and easy way to add people to your address book. Add people by simply clicking on the star icon in the message you receive. Two clicks and you can add more details like a photo, birthday, and other contact information.

Attachment Reminder

The attachment reminder looks for the word attachment (and other words like file types) in the body of your message and reminds you to add an attachment before hitting send.

Multiple-channel chat

Enjoy real-time conversation with your contacts, right from your favorite messaging application, with multiple supported networks. Thunderbird makes it easy to search through both past conversations and received emails.

Tabbed Email

Thunderbird replicates the new look and feel of Mozilla Firefox in an effort to provide a similar user experience across all Mozilla software desktop or mobile and all platforms.

Tabbed email lets you load emails in separate tabs so you can quickly jump between them. Tabs appear on the top of the menu bar providing a powerful visual experience and allowing the toolbars to be much more contextual.

Tabbed email lets you keep multiple emails open for easy reference. Double-clicking or hitting Enter on a mail message will open that message in a new tab.

When quitting Thunderbird, visible tabs will be saved and will be restored when you open Thunderbird the next time. There is also a Tab menu on the Tab toolbar to help you switch between tabs.

Search the Web

You can now search the Web without having to leave Thunderbird. Type whatever comes to mind in Thunderbird’s search box and choose from several different search providers.

You can also highlight words in your email, right click, and select “search the web for:” to start your Web search.

Quick Filter Toolbar

The Quick Filter Toolbar lets you filter your email faster. Start typing in words in the Quick Filter search box and the results are displayed instantly. Or you can filter your email by New Messages, Tags, and people in your Address Book. You can also “Pin” or save a Filter and use it across multiple folders.

Search Tools

The search interface in Thunderbird contains filtering and timeline tools to pinpoint the exact email you’re looking for. Thunderbird also indexes all of your emails and chat conversations to help you search even faster. Your search results are displayed in a tab so you can easily switch back and forth to your search results and other email.

Message Archive

If you think you’re going to need an email in the future but want it out of your inbox without deleting it, archive it! Archiving helps you manage your inbox and put your email into the archive folder system.

Selecting the Archive button or hitting the ‘A’ key will archive your email.

Activity Manager

Thunderbird version 91 is only offered as direct download from thunderbird.net and not as an upgrade from Thunderbird version 78 or earlier. A future release will provide updates from earlier versions.

What’s New

The wait is over! Thunderbird 140 “Eclipse” has reached totality. From all of us at the Thunderbird project, from MZLA staff and the Thunderbird Council to our global community of contributors, we’re excited to announce the latest Extended Support Release has arrived.

Eclipse not only builds on Thunderbird 128 “Nebula,” but also the recent features and improvements from the Monthly Release channel. This latest release transforms your email experience with adaptive dark messaging and improved visual controls. Enhanced features keep everyday email tasks light and effortless, while the streamlined new Account Hub ensures adding new accounts is a snap.

Dark Message Mode

Thunderbird’s Dark Mode now automatically adapts your messages when enabled, with a quick optional toggle to adjust your message view as needed.

Native OS Notifications

Leverage the speed and ease of your Operating System’s built-in notifications, whether you’re on Windows, Linux, or Mac. Quickly delete, archive, or use customizable actions directly from your notifications and get more done with your day.

Manual Folder Sorting

Don’t like the order for your custom folders? Just click and drag to arrange them exactly how you want.

Appearance Settings

Make Thunderbird yours across all your folders and accounts with a single click. Change your message list layout between Cards and Table view, adjust your Cards View, and set your default sorting order and threading options with ease.

Account Hub

Adding a new account to Thunderbird is now easier than ever. Connect all of your emails, address books and calendars in a few easy steps.

Experimental Exchange Email support

Natively set up a Microsoft Exchange account in Thunderbird by enabling a preference.

Export for Mobile

Generate a QR code to quickly transfer your account settings and credentials to your Thunderbird for Android app.

Horizontal scroll for Table View

Lots of tabular data? Let the message list scroll horizontally, like a spreadsheet or file manager.

Bug Fixes and Improvements

Thousands of bug fixes and performance improvements to bring you the smooth, reliable Thunderbird experience you expect.