I've tried opening up the email setup launcher and changing it in there, but the email address that I change it to doesn't work. So clearly I'm missing something.
Add An Existing Email Account
Set up an existing work or personal email account for use with your BlackBerry device.
ex. Yahoo!�, Gmail™, Microsoft Outlook�
BlackBerry Device Email Address
The email address for your BlackBerry is [email protected]
Changing it off the website did the same thing as when I did it through the setup launcher on my phone