This article explains how Thunderbird's adaptive filter learns to identify junk mail ("spam").
Threading is a useful way of displaying message list in Thunderbird with your messages grouped in tree structures by conversations. Here's how to enable it.
If you cannot send messages with Thunderbird, this page provides a series of steps you can follow to check for common problems.
This article explains what end-to-end encryption is and how to use it to protect the contents of your email in Thunderbird.
This article explains how to switch from a POP to an IMAP account in Thunderbird.
Thunderbird stores your personal information and settings in a profile folder. Learn to work with different profiles on Thunderbird.
Keyboard shortcuts are quick key combinations that replace mouse navigation. This is a list of commonly used keyboard shortcuts in Thunderbird.
The Ignore Thread (or Subthread) feature is very useful for mailing lists. It lets you skip reading the rest of a conversation you're not really interested in.
If you cannot receive messages, this page provides a series of steps you can use to check for common problems.
When clicking hyperlinks in email, your default web browser should open and display their content. Learn why that may fail and why links may not be clickable.
This page describes the keystroke combinations used to access various search functions in Thunderbird.
Instantly take part of a message and search for it in Bing, Yahoo, Twitter or other websites.
Some system folders are not allowed when setting Thunderbird storage location as they cause issues.
Illustrated overview of user facing changes in Thunderbird 78.
The menu items File, Edit, View, etc. are located in the menu bar. This article will help you restore a missing menu bar.
Thunderbird no longer supports 512 bit (so called US export) keys for TLS connections.
Find out about all of the Accessibility features available in Thunderbird.
Detailed introduction to the most interesting new features, improvements, and changes visible to users in Thunderbird 91.0.
Detailed introduction to the most interesting new features, improvements, and changes visible to users in Thunderbird 102.0.
How to avoid accepting a counterfeit OpenPGP key when Thunderbird asks you to accept the public key of a correspondent.