It's the government ...
they are searching your email
If you are currently transmitting secret operations to take over the world via email, think again! A federal judge in Oregon ruled recently that the government can take a look at your email without any notice.
A few of the big boys of email -- Gmail, Hotmail and AOL -- already stipulate this in their usage terms. But according to this ruling, the government does not even need to give you notice that they are doing a search.
This seems a bit peculiar. I agree that you should never assume email is a safe haven for information, even if it's encrypted (although you'll have a little bit better chancing keeping it secure that way). But allowing officials to read anyone's email on a whim without telling the individual is a bit much.
You could potentially avoid this by running your own mail server, but who wants to do that?