Paul was charged with 5 counts of sending obscenity through the mails, and 5 counts of transporting obscenity through a computer device.
Max_Hardcore
Seems like maybe he was busted as much for doing extreme stuff and dressing the girls to look underaged.
Using the USPS is a bad idea in my opinion, I am not sure if postal inspectors have any jurisdiction with UPS or Fedex.
Adam and Eve ship to all states using UPS or USPS. I know they have had issues back in the 80's with an obscenity charge, but maybe the vanilla stuff goes USPS and the raunchier goes UPS.