midway… open thunderbird… click tools/account settings… setup your server settings and outgoing smtp settings with the settings required by your ISP.

then… close thunderbird… run the Mail Protection Wizard.

Choose Automatically Protect My Accounts… click NEXT… in the next screen you should be able to pick your Pop and SMTP settings in the drop down boxes… click Next and you are finished.

If your server settings are not showing up there, you may have to use the Manual Option