GD,
As for paper trail, are you looking for something you can send to SLED saying yes you did send it to XYZ? If I send a message with a number of BCC people on it, both my outlook box and my gmail accounts show in my sent folders items who the message went to with the BCC people listed. However, when I forward that message to someone else, the BCC stuff is not shown. So if I needed to prove to SLED I sent the message to XYZ squad, I'd have to do a screenshot of the message in my browser/outlook message.