Thunderbird Setup Email
Step 1: To create new account, click on the Email under the Create a new account tab.
There will be a pop up window and in this case, skip this step by pressing the Skip this and use my existing email in order to do a new account configuration.
Step 2: Mail account setup
Enter your name, your email address and your password. Click Continue to proceed.
Wait for the page to load for a few seconds while it configure some of the settings.