I don't know why I didn't offer this before.
I use the SpamAssasin plugin for Plesk on my server. It makes it easy for people to configure Bayesian filtering, white lists, black lists, etc. If you're afraid you'll miss an important email, you can have it prefix spam with anything you want, and then filter it to a "Spam" folder within BWC. Or you can have SpamAssasin delete what it deems to be spam.
This only applies to those of you that have an email address that is redirecting mail to
If anyone is interested, I can setup an email account for you, such as
that would redirect to your BlackBerry device. As far as I know, this would be completely transparent to you.
In other words, you'd be redirecting mail to your comfx.com account, which would filter spam out, then redirect it directly to your tmo.blackberry.net account.
Just a thought.