Advanced Threat Detection (ATD) refers broadly to a variety of evolving security techniques employed by malware analysts to detect, identify, and respond to advanced and persistent malware threats.
Email Threat Detection is a set of detection practices that functions to protect email infrastructure from potentially harmful, targeted malware attacks. These practices should represent the last link in a comprehensive email security apparatus which should also include other, more rudimentary anti-spam and anti-virus scanning tools for best results.