SPF / DKIM / DMARC Checker
Look up and validate a domain’s SPF, DKIM, DMARC and MX records live in your browser.
Only the domain name is sent to a public DNS-over-HTTPS resolver to read its public records.
About this tool
Look up and validate a domain’s SPF, DKIM, DMARC and MX records live. A fast way to diagnose email deliverability problems or confirm your DNS changes have propagated. Lookups use public DNS-over-HTTPS — only the domain name is sent.
How to use it
- 1 Enter the domain you want to check.
- 2 Optionally set your DKIM selector (e.g. google, selector1).
- 3 Click “Check” to see each record and whether it passes.
Frequently asked questions
Why does my DKIM show as not found?
DKIM lives under a selector that is specific to your provider. Try common selectors like google, selector1 or default, or check what your provider uses.
What is the MX check for?
MX records tell other servers where to deliver your email. No MX means the domain cannot receive mail.
Is any data sent to your servers?
No. The domain is sent only to a public DNS-over-HTTPS resolver to read its public records; nothing is stored.