Learn the Basics. Get Started All All articles and threads In English The difference between IMAP and POP3 Thunderbird and Gmail How to change the Thunderbird layout Cannot send messages Getting Started with the Thunderbird main window (Supernova and newer) Make Thunderbird the Default Mail Client Ignoring threads Installing an Add-on in Thunderbird Protect your Thunderbird passwords with a Primary Password Maildir in Thunderbird Getting started with the Thunderbird main window New in Thunderbird 102 Unified Toolbar Thunderbird Accessibility Features Thunderbird end of Support for XP and Vista Dangerous directories