First, email is not secure.

by R. Proffitt Moderator - 9/17/12 2:02 PM

In Reply to: Windows Live - Nokia Lumia - Help! by findout1

And then after 180 days, the US Gov does not need a search warrant. http://en.wikipedia.org/wiki/Stored_Communications_Act

Best move? Create a new email account and consider it like sending postcards in the mail. Once you know that anyone can read your email, then you know never to put anything you don't want others to know there.
Bob