DMARC compliance is the process of sending emails in compliance with the specifications of DMARC protocol. An email is determined to comply with DMARC only if it aligns with SPF and/or DKIM email authentication protocols, to determine whether an email message sent from an established domain is authorized and authentic, or not.
By authenticating an email against DKIM and SPF standards, DMARC (Domain-based Message Authentication Reporting and Conformance) essentially provides email receivers and domain owners the ability to take policy-based actions against fraudulent emails and prevent email spoofing. The actions may include lodging the emails into the receiver’s spam folder for further review or even outright rejections.