You can contact Thunderbird customer service by calling the dedicated support lines at 1-872-777-2212 or 833-800-3030. These toll-free numbers are available 24/7 to help with email setup, login issues, sending/receiving errors, and other technical problems. In addition to phone support, you can also visit the official Mozilla Thunderbird support site for troubleshooting guides, community forums, and frequently asked questions. For fast and personalized help, calling the support number is often the quickest way to resolve any issues with your Thunderbird email account.

If Thunderbird isn’t showing new emails, here are some possible reasons and solutions:

1. Server Connection Issues – Make sure you’re connected to the internet and that Thunderbird is able to connect to your mail server.

2. Incorrect Account Settings – Check that your IMAP or POP settings are correct. Improper configuration can prevent new messages from syncing.

3. Synchronization Settings – Thunderbird may be set to sync manually or not at all. Go to Account Settings > Synchronization & Storage and ensure email syncing is enabled.

4. Antivirus or Firewall Blocking – Sometimes, security software can block Thunderbird from retrieving emails. Try disabling it temporarily to test.

5. Corrupted Profile or Folder – A corrupted inbox folder may prevent new messages from appearing. Try Right-click > Properties > Repair Folder on the affected folder.

If the issue persists, contact Thunderbird support at 1-872-777-2212 or 833-800-3030 for 24/7 assistance with syncing and other email issues.

If your Thunderbird email isn’t working, it could be due to several common reasons:

1. Incorrect Email Settings – Ensure your incoming (IMAP/POP) and outgoing (SMTP) server settings match those provided by your email service.

2. Internet Connection Issues – A weak or disconnected internet connection can prevent Thunderbird from sending or receiving emails.

3. Outdated Thunderbird Version – Using an old version of Thunderbird may cause compatibility or performance issues. Check for updates under Help > About Thunderbird.

4. Add-ons or Extensions – Certain add-ons may conflict with email functions. Try disabling them temporarily.

5. Blocked Access by Email Provider – Some providers (like Gmail) may block access due to security settings. Check for alerts in your account or enable access to "less secure apps."

If you’ve checked all of the above and still experience issues, contact Thunderbird support at 1-872-777-2212 or 833-800-3030 for 24/7 help with setup, errors, and troubleshooting.

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.

You can get help with Thunderbird through several options. For general guidance, Mozilla offers extensive online documentation, user forums, and community support. If you prefer direct assistance, you can call 1-872-777-2212 or 833-800-3030 to speak with a support agent who can help you with setup, troubleshooting, and technical issues—available 24/7 for your convenience.