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Avoid and report Mozilla tech support scams
Mozilla does not provide telephone support and does not charge for software downloads, upgrades or technical help. Learn more.
Firefox accounts on support.mozilla.org
Frequently asked questions about Firefox Accounts on Mozilla Support.
Keyboard shortcuts - perform common Thunderbird tasks quickly
Keyboard shortcuts are quick key combinations that replace mouse navigation. This is a list of commonly used keyboard shortcuts in Thunderbird.
Profiles - Where Thunderbird stores your messages and other user data
Thunderbird saves personal information such as messages, passwords and user preferences in a set of files called a "profile".
FAQ Changing IMAP to POP
If your mail server supports both IMAP and POP, Thunderbird will use IMAP by default. Use these instructions to manually configure a POP account.
Automatic Account Configuration
Setting up a new account with Thunderbird is easy. All you need to do is provide your user name and password for your email provider and your email address.
IMAP Synchronization
IMAP stands for the Internet Message Access Protocol. It enables a mail client (such as Thunderbird) to access messages stored on a mail server. It is more modern and fully featured than POP (Post Office Protocol), which is the other major protocol for accessing mail messages. Most email providers now support IMAP. To see whether your account uses IMAP or POP, check the Server Settings page in the Account Settings.
Make Thunderbird the Default Mail Client
If Thunderbird is specified as your system's default email application, it will integrate with other applications (such as word processors and web browsers).
How to change the Thunderbird layout
Thunderbird contains three layout options for you to choose from to best fit your preference.
Customize Date and Time formats in Thunderbird
How to customize date and time formats in Mozilla Thunderbird using regional settings or override preferences.
Automatic Conversion of Google mail accounts to OAuth 2.0 Authentication
Thunderbird 91.8.0, released 5th April 2022, converts Gmail accounts to OAuth 2.0 in compliance with Google's schedule for requiring this login method.
How do I create a screenshot of my problem?
A user's guide to creating a screenshot of their problem for uploading to the support forum.
What is the Mozilla Maintenance Service?
Firefox and Thunderbird install Mozilla Maintenance Service to allow seamless background updates. Learn how it works and how to disable or remove it.
Mozilla Crash Reporter TB
The Mozilla Crash Reporter dialog box appears when Thunderbird crashes and lets you send a crash report. Learn how it works and how to access your crash reports.
Cannot receive messages
If you cannot receive messages, this page provides a series of steps you can use to check for common problems.
Moving Thunderbird Data to a New Computer
How to move Thunderbird data (accounts, messages, passwords) to a new computer.
How to Use Attachments
This article explains how to use attachments.
Rebuilding the Global Database
Rebuilding the Global Database will initiate a re-indexing of emails and address book cards (newsgroup messages are not indexed).
Thunderbird and Junk / Spam Messages
This article explains how Thunderbird's adaptive filter learns to identify junk mail ("spam").
Filelink for Large Attachments
Messages with large attachments are often rejected by mail servers. Thunderbird can use web-based storage services to send large file attachments.