This book describes trends in email scams and offers tools and techniques to identify such trends. It also describes automated countermeasures based on an understanding of the type of persuasive methods used by scammers. It reviews both consumer-facing scams and enterprise scams, describing in-depth case studies relating to Craigslist scams and Business Email Compromise Scams. This book provides a good starting point for practitioners, decision makers and researchers in that it includes alternatives and complementary tools to the currently deployed email security tools, with a focus on understanding the metrics of scams. Both professionals working in security and advanced-level students interested in privacy or applications of computer science will find this book a useful reference.