Mozilla Thunderbird

You should start by opening the Account Settings... by going to the Tools menu
Then go to Outgoing Server (SMTP) in the left-hand column, at the bottom.  Your server name should be whatever comes after the @ sign in your e-mail address.  Example:,. your Server Name would be  You must make sure that Use name and password is checked and that the User Name is your entire e-mail address.  Click on OK and your done.