DMARC Email Authentication

Email authentication policy protocol building on SPF and DKIM to block domain spoofing and phishing.

Core Principles & Analysis

• Published as RFC 7489 in 2015.
• Domain owners publish DNS TXT policies instructing receivers to quarantine or reject failing mail.
• Aligns SPF and DKIM results with the visible From address to stop exact-domain spoofing.

Specifications & Metrics

• PROTECTS: Email sender domains