When I first installed my software, I clicked BES instead of BIS (not knowing the difference at the time), so I thought removing the software and re-installing it (clicking BIS the next time) would solve the problem. But I'm still getting the emails. Perhaps I should call the Blackberry company or something?
Who knows - maybe I set something in motion the first time (clicking BES) that couldn't be undone by reinstalling the software.
Thanks for your input!