Step 1: Enter your name, email address, and password and click on Continue:
Thunderbird will try to automatically grab the server settings, please compare to the picture below.
Step 2: After shows these settings, click on Done
Step 3: You will get a warning message to remind you that email not being encrypted. Check the 'I understand the risks' box and click create account to finish:
That's it, you are done, the section below is just a guide for fixing the outgoing authenication setting, which you don't need to do if you followed the steps above.
Click on Tools then Account Settings:
Click on Outgoing Server, then Edit...:
Change Authentication Method to No Authentication
Click OK to get out of the menus, and the fix is done.