Troubleshooting Discover solutions for common issues and explore best practices to diagnose and resolve problems. Konke All articles and threads NgesiNgesi Microsoft OAuth Authentication and Thunderbird in 2024 Profiles - Where Thunderbird stores your messages and other user data Mozilla Crash Reporter TB Cannot send messages Rebuilding the Global Database Cannot receive messages Sending and Receiving Messages on Thunderbird FAQ Changing IMAP to POP Unable to use profile when you launch an older version of Thunderbird Troubleshoot Mode Thunderbird Cannot delete messages Profiling Thunderbird Performance Hyperlinks in Messages Not Working Compacting folders - Potential complications Inbox or Other Folder Full Rebuilding Global Database How can I avoid to reach the "over quota" limits of my mail server? userChrome.css and .js and userContent are unsupported