Ninety miles from the South Eastern tip of the United States, Liberty has no stead. In order for Liberty to exist and thrive, Tyranny must be identified, recognized, confronted and extinguished.
Borepatch did a piece on this. He says that with the search tools the FBI has, it's not that hard to imagine. Search for key names, email addresses, unique IDs in the emails and such. There's no reason to have to actually read all of those emails.