http://svoboda7s2yird3p643lzbl7d6yc3rcciowopcxclqw6fsq26vmqruyd.onion/blog/how-to-send-an-encrypted-email
It means that governments can force them to turn over your emails, or corporations could buy them, which makes them public by default. Today I will show you how to send an actually encrypted email using GPG. This method doesn’t require any special client software, it will work on Outlook, Gmail, Yahoo, etc.