Demystifying DMARC: A guide to preventing email spoofing

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Presented at BSidesColumbus 2019 by

Sean Whalen

Domain-based Message Authentication, Reporting, and Conformance (DMARC) has been steadily gaining adoption in the financial, public, healthcare and other sectors as a standard way to prevent email from address spoofing since its publication in 2015.However, misconceptions and high costs often deter organizations from fully deploying DMARC. This talk will explain what DMARC is, how it works, why you should deploy it, best practices/common mistakes, and how DMARC can be deployed without paying another vendor.