mozilla thunderbird email troubleshooting

The mail server sent an incorrect greeting. The fix? Try sending a message and you'll receive a different error: ' An error occurred sending mail.

In simpler terms, you tried logging on to the mail server to send and receive emails with the wrong password or incorrect settings to many times and you are now blocked because the mail server has mistaken you for a hacker. The reason for this error is because your IP address has been blacklisted.

Connection security should be normal password.ġ) An error occurred with the POP mail server. You can also set it to use port 465 with connection security set to SSL/TLS. Authentication method is Password, transmitted insecurely. Port is 587 and connection security is None. Click on Outgoing Server(SMTP) and press Edit. Connection Security should be set to SSL/TLS and authentication to Normal Password. Make sure your server name is '' and port is set to 995. Note: You might need to press the Alt key located on the bottom of the keyboard on the left-hand side of the Space Bar to got Tools to appear.

Upon opening Thunderbird go to the top to Tools > Account Settings > Server Settings. You should also make sure that encryption (SSL/TLS) is enabled on your device or email program. The next section explains the proper settings you should use.įor more information, please read this article describing how to enable SSL encryption in an email program, including a list of more specific articles that describe how to configure SSL encryption in the most common email programs (Outlook, Thunderbird, Apple Mail, etc.).This should show the user how to make sure ThunderBird is configured with the correct settings and further troubleshooting tips.ġ) Make sure ThunderBird is configured correctly. Your Email Program Does Not Support TLS 1.2Įmail access either without encryption and through the TLS 1.0 and TLS 1.1 protocols have become deprecated, meaning they do not meet current security standards. Access to our email servers by any of these methods will be disabled in order to protect your email communications. In order for the transmission of emails between your device/email program and our email servers to continue working, they must support the TLS 1.2 protocol or higher and encryption (SSL/TLS) must be activated.Ĭheck the documentation for your device or email program to see if it supports TLS 1.2. If necessary, update the software in question. The latest versions of the most common email programs support the more secure versions of TLS 1.2 and TLS 1.3.

Mozilla thunderbird email troubleshooting