Thunderbird: Configuration could not be verified - is the username or password wrong

Solution:

1. Goto "%APPDATA%\Thunderbird" (without quotes)
2. Delete everything in this folder(Better you cut and paste everything to some other location)
3. Start Thunderbird
4. Create a new account
5. Now it will work

Cheers

Keywords: thunderbird, email, smtp, hmail, server,email-client