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DMARC checker

Look up a domain's DMARC record and explain its policy, alignment and reporting tags in plain language.

Press the button to run the lookup
Nothing leaves this page until you do. A record found on the organizational domain is labeled as inherited, the way receivers read it, and a domain with no record at all is told to you straight.

This tool reads and explains the record; it does not verify that report mailboxes receive anything, and it does not check SPF or DKIM themselves, on which every DMARC outcome depends. The organizational-domain walk uses a curated subset of the Public Suffix List ( 140 entries, snapshot 2026-10), not the full list, so a rare suffix can produce a wrong walk target.
Options

More network tools

- Live DNS lookup (/network/dns)
- DNS explainer (/network/dns-explain)
- RDAP lookup (/network/rdap)
All network tools (/network)

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Canonical HTML: https://nutter.tools/network/dmarc-checker
Markdown version: https://nutter.tools/network/dmarc-checker.md
Plain-text version: https://nutter.tools/network/dmarc-checker.txt
Agent index: https://nutter.tools/llms.txt