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