Jstreet - not sure this is what ur looking for, but if you're in you inbox on your BB, scroll to today's date, click the trackwheel, and select "Delete Prior" and it will delete all emails/msgs/etc received up to that point. I suppose if you go to y'day's date in your inbox, you'll only delete what was received prior to today. It gets rid of everything, so be careful to save if there's something you need.

Juan