In thunderbird click on
Select the 'Email account' radio button, then click Next
On the Identity panel
On the Server Information panel
On the User Names panel
On the Account Name panel
Your account has now been created.
The first time you pop your email you will be prompted for your password.
*NOTE* You need to know what your ISP's outgoing mail server (SMTP)is in order to send mail. This may require the additional steps of configuring the secure authentication setting in order to send any mail. If you require any assistence with this, please contact your Internet Service Provider (Rogers, Bell, Cogeco, etc).