DMARC record validator
Validate your live DMARC DNS record and get a pass/fail checklist for required tags.
Use this DMARC validator to test your published DNS record and catch common configuration errors.
What this DMARC validator checks
- DMARC record discovery in DNS
- Required tags like
and - Aggregate reporting tag (
) - Overall record validity from MailSlurp tooling
Fixing failed validation
If validation fails, start by checking:
- The record is published at
- The record includes
and a policy tag like - Tags are separated with semicolons and contain no extra quotes
Recommended rollout
Many teams start with monitoring and tighten enforcement over time:
- Publish
with a validaddress to collect aggregate reports - Move to
after alignment is stable - Enforce
once legitimate senders are fully covered
When to run DMARC validation
- Right after publishing DNS changes
- During staged rollouts from
to - After domain migrations or ESP changes