Kafka, meet Orwell: Lavabit's founder explains why he shut down his company

The problem is that you first have to define the term “illegal warrant.” As far as I understand, it’s a contradiction in terms.

What article of the constitution can a search warrant violate? The fourth amendment prohibits search without a warrant.

I’m not saying you’re wrong morally, I’m saying that I don’t think our existing constitution has any notion of an “illegal warrant.” Until we have a new amendment – or until the supreme court rules that searching data is not the kind of “search” the writers intended (though it basically was, if “searching” included reading letters) – then we don’t have any laws to protect the Lavabits in this country. Put the servers on Sealand or somewhere.