Two novel and related anti-spam systems that enable the authentication of every mail server and every personal computer in the world. This system is practical because it requires only a one-time software update on behalf of a small handful of software vendors and it can be seamlessly integrated into existing infrastructure. Neither the awareness nor participation of individual users, domain administrators, or server administrators is required for this to function. This narrated PowerPoint was presented at the 8th Annual Collaboration, Electronic messaging, Anti-Abuse and Spam Conference (CEAS2011) in support of one of the conference papers: "Automatic Authentication of Email Servers and Personal Computers Independent of the Active Participation of Server Administrators or Personal Computer Users'
