This may answer some of your questions.
http://camcaps.net/technical-and-computer-related-discussions/rlc-ip-banning-and-how-to-get-around-it/
As for RLC seeing your email here? No.
Anything placed in the attachment center is still there as best I know. I don't view it, so I can't answer in all truthfulness.
A well placed mole can rat you out quietly, but that goes against the Terms and Conditions for being a member here at CC. So again, I refer you to 'itsme's' post link above.