Look, its moving a bit off topic but I'm sorry SPY if the authorities want to know what you are up to watching your email is a bit simplistic.
Firstly that nice security guard who looks after your offices at night sticks one of these on your PC and lifts it off after a month.......
http://www.bitztechnology.com/Keykatcher.htm
Then a copy of back orifice, encrypted into a jpeg so it bypasses your anti-virus is installed on your home PC when you recieve it as an email from Mr Unknown........
http://www.bo2k.com/
A GPS tracking device is stuck under your car.
Your mobile/pager is 'cloned' and all communication is recorded.
And thats just the easy stuff all allowed by
http://www.hmso.gov.uk/acts/acts2000/20000023.htm
So don't be paranoid, try
www.hushmail.com if you want easy encryption, or get your own PGP key for real security.
For a bit of fun try encrypting your email as spam
http://www.spammimic.com/
In this day and age there's no such thing as privacy.
By the way the keycatcher is great, stick it on the bosses PC when he's out and get to know who he's shagging.