Correct. When you set the mail up on the Strom, it acturally "register" an email account on BIS. In fact, you should receive a SMS from BIS to comfirm that account has been set. When you log onto BIS, you have many options that you can apply to the email account you have set with BIS.
Here is the link for BIS (for Verizon service):
https://bis.na.blackberry.com/html?brand=vzw