To fix Thunderbird email problems, start by checking your account settings, including your incoming (IMAP/POP) and outgoing (SMTP) server details. Make sure your internet connection is stable and that your email credentials are correct. You can also try restarting Thunderbird, disabling conflicting add-ons, or updating to the latest version. If the issue persists, you can get expert assistance by calling 1-872-777-2212 or 833-800-3030 for 24/7 support with troubleshooting, error resolution, and email configuration.