CISPA is trying to worm its way into law again, but even while that's going on, members of the Senate Judiciary Committee have approved the Electronic Communications Privacy Act (ECPA) Amendments Act, a bill that actually increases email privacy. The new amendments seek to require a warrant to access any form of electronic communication.
Electronic Communications Privacy Act
Search and surveillance has always been a part of criminal investigation and to keep things from going too far, searches generally require warrants. That's how it works in the physical world, and for the most part, that's how it works in the cyberworld too. There's one big difference though: In the real world, police sometimes come to your door with the warrant, letting you know something is up; whereas in cyberland searches and surveillance are secret by default. As such, many of those surveilled in investigations that never turn into cases will never know they were being watched. U.S. Magistrate Judge Stephen Smith sees this as a problem.