Glossary: Threats, Threat Actors and Motivations

DMARC

Also written: Domain-based Message Authentication, Reporting, and Conformance, DMARC record

Domain-based Message Authentication, Reporting, and Conformance: an email standard that ties the SPF or DKIM result to the From domain the reader sees, and publishes the domain owner's policy for failures. It is the only one of the three that both checks the visible address and tells receivers to reject forgeries.