Not sure how much help I will be. I did all my emails through the email set up. I would assume that you would just go to the site to log in. The same as on a pc. Can I ask why you don't just add the email to your bb through the set up??
Strange. That's how I've always done it. It would just be easy to add it as an email to the bb though. You can set it to not notify you but it would just be there set up.