I use a rule to catch e-mails that are sent to me, but others have been BC'd on. You can't see who was BC'd, only that others were copied on it. It is just a simple rule that checks the BC field for <anything> (excluding my full name and user ID)and then moves the e-mail to a folder which indicates that piece of e-mail had a BC recipient included. I created this rule when we running GW 5.x. I don't know if this is possible under GW 6.x.
FarOut
V-Peace-V