Hi and Welcome to the Forums!
If that is the only email option you have, then your account with your carrier does not contain what is needed to use their BlackBerry Internet Service -- that service, which they control, is what provides the bridge between your BB and internet facing email systems. Contact your carrier and ask them what you need to do with them in order to provide you the services you desire.
Good luck and let us know!
If you are the original poster (OP) and your issue is solved, please remember to click the "Accept as Solution" button so that others can more easily find it. If anyone has been helpful to you, please show your appreciation by clicking the Star on the left of their post. Cheers! Oh...and FWIW...I am not a RIM employee...and these forums are user-to-user...not user-to-RIM.
