Is an acronym for "Domain-based Message Authentication, Reporting & Conformance". It is a technical standard that helps protect email senders and recipients from spam, spoofing, and phishing. A DMARC policy is published to request feedback from receiving email servers and to tell them what to do with messages that are not authenticated by the sending domain. DMARC builds upon both the DomainKeys Identified Mail (DKIM) and Sender Policy Framework (SPF) specifications. Policies include "none", "quarantine", or "reject".
