AP Photo

Tomorrow, as the Senate Judiciary Committee considers reforming the decades-old federal email privacy law, the personal Inboxes and love lives of senior military and intelligence figures may be on that august body's mind.  When the FBI pored through the personal lives of CIA Director David Petraeus, Paula Broadwell, Jill Kelly and General John Allen, citizens across the land began to wonder how the FBI could get that kind of information, both legally and technically.

So, just how do you exchange messages with someone, without leaving discoverable records with your webmail...