This will help you know if your firewall or antivirus is causing the problem. Then turn on the firewall or antivirus and try to send the mail.Turn off the firewall or antivirus and try to send the email.Make sure that your firewall or antivirus is not blocking your outgoing emails. Check if Firewall or Antivirus is Causing the Issue To know which IMAP settings you use, check the official website of your email client. Ensure that you are using the correct IMAP settings.Click on the three lines and open the Menu option.If the above method does not solve your problem, check your IMAP server settings. Make sure that you’re using the correct SMTP server for your email address.Check your username and password, followed by your email address.Open Thunderbird and opt for Account Settings.If you could not find your mail settings, search for new mail settings (SMTP). Now match your mail server details with the details shown by the browser.

Now click on the (SMTP) outgoing server.Choose Account Settings in the Tools section.If SMTP settings are incorrect, you may not able to send emails via Thunderbird.įollow the below steps to check SMTP settings: The SMTP server collects the mail you send and forwards it to the recipient. Simple Mail Transfer Protocol or SMTP plays a significant role in sharing emails. Methods to Fix the Thunderbird Email is Not Working Issue Check SMTP Settings Check the below methods to resolve this problem. If you’re facing the same problem, we are here to help you. However, there are various other reasons that may lead to this issue. One common problem the users often face is “ Thunderbird email is not working.” Such an issue may arise due to a problem with the SMTP server settings. However, even a popular email client like Thunderbird is not devoid of issues. It is an open-source, cross-platform, and free email application. Mozilla Thunderbird is one of the most popular and reliable email clients. Methods to Fix the Thunderbird Email is Not Working Issue.

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