DMARC builds on SPF and DKIM, allowing you to specify how recipients should handle messages that fail these checks. It also provides reporting features to help you monitor and improve your email authentication. A basic DMARC record looks like this: v=DMARC1; p=none; rua=mailto:dmarc-reports@example.com; This record tells recipients to take no action (p=none) if an email fails authentication and sends aggregate reports to the specified email address (rua).