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DMARC (Domain-based Message Authentication, Reporting, and Conformance) protects your domain against spoofing and phishing.

DMARC Record Syntax

Add a TXT record at _dmarc.yourdomain.com:

Policy Progression

  1. Phase 1: Monitoring (p=none)
    • Messages that fail alignment are still delivered.
    • Aggregate XML reports are sent to your rua email address.
  2. Phase 2: Quarantine (p=quarantine)
    • Messages that fail alignment are delivered to the recipient’s spam folder.
  3. Phase 3: Reject (p=reject)
    • Messages failing alignment are completely dropped by receiving MTAs.