How to Configure DMARC p=quarantine to Protect Your Domain from Email Spoofing

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DMARC is an email authentication protocol built on SPF and DKIM that lets domain owners control how receiving mail servers handle unauthenticated emails. The p=quarantine policy is a middle-ground enforcement level that routes failed messages to spam folders rather than rejecting or ignoring them. Before enabling p=quarantine, domain owners must correctly configure SPF and DKIM records and ensure proper domain alignment in email headers. The recommended approach is to first deploy DMARC in p=none monitoring mode to identify all legitimate sending sources and fix misconfigurations. Gradually moving to p=quarantine reduces the risk of spoofing and phishing while minimizing disruption to legitimate email delivery.

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ProgrammingDEV Community ·

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