DMARC Checker
Inspect DMARC policy, reporting configuration and enforcement posture.
Email
Free DKIM Record Checker
Look up a DKIM public key by domain and selector and inspect key type, public-key presence and flags.
Your input is processed only as required by this tool.
Free DKIM Record Checker
DKIM signs email with a private key while receivers fetch the corresponding public key from DNS. Because DKIM records live under a selector-specific _domainkey name, this checker asks for both the domain and selector, then inspects the published TXT record and key tags.
How to use it
- Enter the public domain you want to inspect.
- Run the DNS check and review the published email configuration returned by the authoritative DNS path.
- Use the findings together with the related SPF, DKIM, DMARC and MX checks before changing production email DNS.
How to read the result
A record with a public key means DNS exposes material that receivers can use for DKIM verification. The result does not prove that a particular message was signed correctly; message verification requires the actual headers and signature.
Limitations
Selectors are chosen by the sending provider and cannot be reliably guessed for every domain. You must provide the selector used by the sender, such as google, selector1 or a provider-specific value.
Frequently asked questions
What is a DKIM selector?
It is the label that identifies a particular DKIM key under selector._domainkey.example.com.
Can the checker discover my selector automatically?
Not reliably. DNS does not provide a standard directory of all DKIM selectors, so the sender or provider normally supplies it.