Glossary: Security+ Exam Prep 2: Performance-Based Questions

DMARC (Domain-based Message Authentication, Reporting, and Conformance)

Also written: p=none, p=quarantine, p=reject, _dmarc

An email standard that requires the visible From domain to align with a domain that passed SPF or DKIM, and sets what happens to failures: p=none only reports, p=quarantine sends them to spam, and p=reject refuses them.