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Authentication
DMARC Checker
Check any domain's DMARC record. Inspect policy (none/quarantine/reject), pct, rua/ruf, sp, and alignment modes.
This tool is being wired up. The analyzer ships in the next build phase.
About this check
Inspect DMARC policy, alignment, and reporting addresses.
Frequently asked questions
- What does the DMARC Checker actually check?
- Inspect DMARC policy, alignment, and reporting addresses.
- Is this really free?
- Yes. Every on.bo tool is free, no signup required, no rate-limit tricks.
- Do you store the data I check?
- We log minimal metadata to keep the service healthy. Lookups themselves are not retained beyond short-term caching.