It is possible that the site has changed its portal and the link to the site log-in is not the same today as it was last time. This could prevent Thunderbird from completing the log-in. <br /> If Thunderbird stored your log-in details, it should be accessible from the Password Manager. 'Tools - Options - Security - Password' Press the ''''Saved Passwords'''' button On the next screen is a list of all the sites that you have allowed Thunderbird to manage for you, with the site address and username. Passwords are not yet visible. In the search box, enter '''suddenlink''' and see if any entries come up. To view the password, press the button "Show Password'. Confirm again 'Are you sure...?' If you find a log-in password, remember it and try to log onto the '''suddenlink''' webmail site using the username and password listed in the Password manager. If you are unable to log-in, there is usually a link to 'Forgotten Password' where you can answer a few security questions and have your password reset and an email sent to the address that you used when setting up the account. If you have your password reset, you will have to delete the Thunderbird entry in Password Manager. The next time you use Thunderbird to access your mail, you will again be asked for the password. Enter the new log-in sent to you, and then allow Thunderbird to save the log-in. Let us know how you fare. TB-38.3 Win10-PC