No big surprise
@Pandy06269: Blackberry makes the devices and they also run the mail servers that handle the "push" traffic (i.e. when you send an email to the address assigned to your Blackberry, such as joebob@tmo.blackberry.net).
On that same note, RIM has always been a little clueless when it comes to properly running a mail server. For example, they had a problem about a year ago (and I'm sure they still do) where they would silently drop all forwarded emails where the original sender was @yahoo.com. If you decide to redirect a copy (M$ Exchange rule) of your incoming email to your @*.blackberry.net address to get them "real time", and the original sender was @yahoo.com, the RIM servers would accept the email, then silently drop it on the floor. After multiple hours on the phone with their clueless "tech support" people, along with countless mail logs proving they accepted the emails, the problem was never fixed (luckily the person experiencing the problem has moved to an iPhone that syncs directly with Exchange).
I personally think it's all a scam to try to force the users to buy their stupid Enterprise Server software.