DMARC
DMARC (Domain-based Message Authentication, Reporting, and Conformance) is an email authentication protocol that builds on SPF and DKIM to help domain owners protect their domains from unauthorized use, such as email spoofing and phishing. It allows senders to specify how receiving mail servers should handle emails that fail authentication checks, and provides reporting mechanisms to monitor email traffic. By implementing DMARC, organizations can improve email deliverability and reduce the risk of their domain being used in malicious attacks.
Developers should learn and implement DMARC when working on email systems, security protocols, or domain management to enhance email security and compliance. It is crucial for preventing email fraud, ensuring legitimate emails reach recipients, and meeting regulatory requirements in industries like finance and healthcare. Use cases include setting up email authentication for corporate domains, integrating with email service providers, and analyzing email traffic reports to detect anomalies.