# How to Fix Thunderbird Email Not Working Issues?

Thunderbird is one of the most popular email clients for Windows users thanks to its attractive interface, unified inbox, and integration with multiple accounts and productivity apps. But even the best software can run into problems from time to time. When Thunderbird stops sending or receiving emails, freezes, fails to sync, or shows errors, your workflow can come to a sudden halt. If you're facing Thunderbird email not working issues, don’t worry—most problems can be fixed with a few quick steps. In this guide, we’ll walk you through the most common causes and show you the best solutions to get Thunderbird working smoothly again.

**Thunderbird Helpline Number 1-877-513-2924**

# 1. Check Your Internet Connection

It might sound simple, but a weak or unstable internet connection is one of the most common reasons Thunderbird stops syncing email.

How to fix it: -

 Make sure you’re connected to Wi-Fi or Ethernet.
 Restart your router or switch to a different network.
 Try opening a website to confirm your internet is working.

If the internet connection is slow or unstable, syncing issues may continue until it’s restored.

# 2. Verify Your Email Server Settings

If your Thunderbird email isn't sending or receiving messages, incorrect server settings may be the cause. Thunderbird usually auto-detects these settings, but occasionally they may need manual adjustment—especially for IMAP, POP3, or custom domain emails.

**What to check:**

 Incoming server (IMAP or POP)
 Outgoing server (SMTP)
 Port numbers
 Encryption type (SSL/TLS)
 Authentication requirement

**Where to find the correct settings:**

 Your email provider’s website
 Your webmail account
 Email hosting control panel

> ***Once updated, restart Thunderbird and try syncing again.***

**3. Re-enter Your Email Password**

Sometimes email providers automatically log you out for security reasons, or your password may have changed. When this happens, Thunderbird won’t be able to access your account.

**How to fix it:**

 Go to Thunderbird Settings > Accounts.
 Choose the email account that isn't syncing.
 Re-enter your password.
 Save and try syncing again.

If you recently changed your email password in your webmail, make sure you update it inside Thunderbird too.

**4. Enable Less Secure Apps (For Older Email Servers)**

Some email providers, especially older or private servers, may block Thunderbird as a “less secure app.” While Thunderbird is secure, the email server may require specific settings.

**Try the following:**

 Enable IMAP access in your email account.
 Allow third-party email access.
 Activate “less secure app access” (depending on your provider).

> **Note: Gmail and Outlook often require enabling app-specific permissions or two-factor authentication settings.**

# 5. Check if Your Email Provider Is Down

Email services occasionally experience outages.
Gmail, Yahoo, Outlook, and others have had downtime in the past.

**How to fix it:**

 Visit a downtime checker like “DownDetector.”
 Search for your email provider.
 If there’s an outage, you’ll need to wait until service is restored.

**Thunderbird will start syncing automatically once the provider is back online.**

# 6. Disable Antivirus or Firewall Blocking

Some firewalls or antivirus applications mistakenly block Thunderbird’s connection to email servers.

**How to diagnose:**

 Temporarily disable your firewall or antivirus.
 Try syncing mail again.

**If email sync works, you’ll need to whitelist Thunderbird in your security software.**

**Whitelist Thunderbird by allowing:**

 Thunderbird.exe
 IMAP/POP and SMTP ports
 Secure SSL/TLS connections

# 7. Update Thunderbird to the Latest Version

Outdated software can cause bugs, syncing problems, and server compatibility issues.

**How to update Thunderbird:**

 Go to Thunderbird > Settings > About.
 Check for updates.
 Install the newest version.

***Thunderbird frequently releases improvements and bug fixes that help resolve syncing and performance issues.***

# 8. Repair Corrupted Thunderbird Installation Files

If Thunderbird becomes slow, freezes, or behaves strangely, its installation files may be corrupted.

**Steps to repair:**

 Close Thunderbird completely.
 Restart your computer.
 Reinstall Thunderbird from the official website (your emails remain safe).

***This often resets anything that might be causing internal glitches.***

# 9. Check Your Email Storage Limits

Some providers—especially business or school accounts—have strict storage limits.

**If your mailbox is full:**

 You won’t receive new emails.
 Syncing may stop entirely.

**Fix it by:**

 Deleting old messages.
 Emptying spam or trash.
 Increasing your mailbox storage (if allowed).

# 10. Contact Thunderbird Support

If none of the above fixes solve the issue, contacting Thunderbird support is the best next step.

While Thunderbird does not offer a helpline or phone support, you can:**1-877-513-2924**

 Visit the Thunderbird Help Center for guides.
 Submit a support ticket for personalized help.
 Join the Thunderbird Community Forum.

> Support agents usually request logs or screenshots to diagnose the issue accurately.

# Final Thoughts:1-877-513-2924

Thunderbird email not working issues can be frustrating, but most problems are easy to solve with the right troubleshooting steps. Whether it’s a connection issue, password error, outdated settings, or software glitch, the solutions above will help you get Thunderbird running smoothly again.