The Mozilla Thunderbird won’t download emails: This problem can sometimes occur due to your antivirus, and to fix the problem, you might have to disable or remove your antivirus software.

Mozilla Thunderbird is very slow: Many users reported this issue, but we already covered this problem in our Thunderbird is a slow article, so be sure to check it out for more solutions.

To fix it, be sure that your login information is correct.

Mozilla Thunderbird problems sending emails: This issue can occur if your email account isn’t correctly configured.

Thunderbird issues can prevent you from receiving new emails, and speaking of Thunderbird, these are some common problems reported by users: You need to disable these security tools or uninstall and replace them with one of the best antiviruses for Windows 10. Users have mainly found AVG and some third-party antiviruses to cause this.

Antivirus interference: If Thunderbird is stuck on loading a message, it might be your antivirus causing issues.

The solution here is to use Thunderbird in safe mode. Also, it might be due to some of your startup apps.

Problems with third-party apps: If you started noticing that Thunderbird freezes on startup after installing an app, the issue might well be caused by that app.

Listed below are some of the prevalent ones: There are a series of factors that can cause the Thunderbird not responding issue. Fortunately, it is not the most challenging issue, as it only requires a tweak or two. This can be annoying, as it renders the email client completely useless. However, users have been complaining that Thunderbird is not responding on their PC for some reason. Thunderbird is one of the best desktop email clients on Windows 10, thanks to its ease of use and efficiency.

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