DMARC (Domain-based Message Authentication, Reporting & Conformance)
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DMARC is a policy framework that builds on SPF and DKIM, enabling domain owners to specify how receivers should handle unauthenticated emails (monitor, quarantine, or reject) and to receive feedback reports on authentication performance.
- Policy levels:
- none: Monitor only.
- quarantine: Unauthenticated messages may go to spam.
- reject: Unauthenticated messages should be blocked.
- Benefits:
- Improves brand protection against spoofing and phishing.
- Provides visibility into who is sending on behalf of your domain, including misconfigurations and unauthorized senders.
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