What is DMARC?
DMARC (Domain-based Message Authentication, Reporting & Conformance) is an email authentication protocol that helps protect your domain from email spoofing and phishing attacks. It builds on SPF and DKIM to provide comprehensive email security.
DMARC Policy Recommendations
Start with "None": Begin with monitoring mode to understand your email flow without blocking legitimate emails.
Progress to "Quarantine": After reviewing reports for a few weeks, move to quarantine to catch most spam while allowing manual review.
End with "Reject": Once confident in your setup, use reject for maximum protection against domain spoofing.
Use Reports: Enable aggregate reports to monitor your email authentication and identify issues.