And dlew, if it helps, no one is reading your emails. There's a huge difference between the ominous sounding "intercept" and actual "surveillance".
Imagine if the discovery phase in a case worked slightly different, and instead of requesting documents, you had access to a huge repository of potentially relevant data. But if you used your subpoena to access a document you weren't sure was discoverable and hadn't been vetted, you were thrown off the case, suspended without pay and faced possible termination and criminal charges (even if you discovered an unrelated crime and even if that crime was serious).
No one is haphazardly rooting through your stuff.