Yes. It is no different than wanting to enter and search someone's home. E-mails are private property. It is terrifying that this is even up for question. Voting no opens the door even wider for Big Brother's invasion of our privacy and hijacking of our rights. If warrants are not required just imagine the kinds of abuses that will happen...get on the wrong side of someone, get reported as "suspected up to no good" (insert your own labels here), and the next thing you know you're life becomes hell because law enforcement can do whatever it wants with no burden of proof and no rules.