I forward all my email from my own mailserver to my Blackberry address, sometimes people send me a large file, and I get if on my desktop, but the BWC bounces it for being too large, and of course the sender than suddenly has access to my blackberry email address...

Also, sometimes when there is downtime on the BWC RIM sends mail delay error messages to the sender, WITH my bb email.

I wish I could turn off error reporting on the BWC :(