Protect your Privacy How to Send Encrypted Emails in Linux

While no one may have a real reason to spy on you, relying solely on security through obscurity has always been a poor policy to live by.

Because of this, encryption is the only real option you can trust. We teach you how to put your emails in a lockbox before sending them off to their destinations.

Check it:
http://www.maximumpc.com/article/features/protect_your_privary_how_send_encrypted_emails_with_linux