Since you're new, here are some tips to get started.
Go to T-Mobile's web-client site to get your POP email redirecting setup. You can also push your service books (sort of like keys to unlock the functionality of your device) - they need to come from the Blackberry Web Client (BWC) in order to work. Sometimes they get pushed automatically, sometimes it helps to push them along.
Here's the URL: https://webclient.blackberry.net/Web...w.jsp?site=tmo