Free read-only checker
Free DMARC Checker
A DMARC checker queries the TXT record at _dmarc.yourdomain and evaluates whether the published policy can be parsed and used by receiving mail systems.
What does p=none mean?
p=none requests monitoring without asking receivers to quarantine or reject messages that fail DMARC. It is commonly used while collecting reports and correcting legitimate sender alignment.
What do p=quarantine and p=reject mean?
These policies ask receivers to treat failing messages more strictly. Quarantine commonly routes them toward spam handling, while reject asks receivers not to accept them. Deployment should follow sender inventory and report review.
How do SPF and DKIM relate to DMARC?
DMARC evaluates alignment between the visible From domain and an authenticated SPF or DKIM domain. Passing SPF or DKIM without alignment may not produce a DMARC pass.
What happens after you submit?
The focused checker opens the full Sentryx outside-in report for the submitted domain. The same public scan backend can show related DNS, TLS, host, email-security, and header evidence so a narrow check can lead to a more complete ownership and monitoring decision.