Sometimes, Thunderbird may give an error stating that the connection to the server has been reset.

You may dont know how to fix the issue.

This post fromMiniToolprovides multiple methods to get rid of the Thunderbird connection to server was reset issue.

Mozilla Thunderbird Download/Install/Update for Windows/Mac

Gmail usually reports this issue.

The following are some possible reasons:

What is Mozilla Thunderbird?

How to download Thunderbird and install/uninstall it on your Windows/Mac?

Avast Email Signature | How to Turn off Avast Email Signature?

This post provides a full guide for you.

Now, lets see how to fix the Thunderbird connection to server was reset issue.

Thus, its recommended to turn off it.

turn off Windows Firewall

Step 2: Then, you better clickSettingsto continue.

On the next interface, you better go toProtection > Core Shields.

Step 4: ClickOKto save the changes.

Here is how to do that.

Step 1: Open theSettingsapplication by pressing theWindows+Ikeys at the same time.

Step 2: Then, click theNetwork & Internetpart to open it.

Step 3: Click theProxytab and turn off theUse a proxy serveroption.

After that, peek if the error Thunderbird connection to server was reset has gone.

Here is how to do that.

Step 1:Right-click theStartmenu and selectPrograms and Features(Apps and Features) from the context menu.

Step 2: In the pop-up window, find theAVGprogram, right-click it and selectUninstall.

Then follow the on-screen prompts to complete this process.

Step 3:start your PC to take its effect.

After that, you’re able to download this software from its official website.

After reinstalling the software, launch it and see if the issue is gone.

Thus, you need toturn off Windows DefenderFirewall and third-party antivirus software temporarily.

Now, lets see how to turn off Windows Defender Firewall.

Step 1:Open theRunapplication on Windows and inputfirewall.cpl, then clickOKto openWindows Defender Firewall.

Step 2:ClickTurn Windows Defender Firewall on or offto open theCustomize tweaks.

Step 3: Choose both theTurn off Windows Defender Firewall(not recommended)options and press theOKbutton.

Final Words

How to fix Thunderbird connection to server was reset?

This post has shown 4 reliable solutions.

If you have come across the same error, try these solutions.