DNSTools
DMARC Lookup
Validate email authentication policies
DMARC Policy Information
DMARC builds on SPF & DKIM to define policy for handling authentication failures and reporting.
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DMARC Policy Guide
- None: Monitor only, no action taken.
- Quarantine: Send to spam folder.
- Reject: Block the email entirely.
- RUA: Aggregate reporting email.
- RUF: Forensic reporting email.