Tool guide limitationsGuides explain the intended workflow but cannot cover every device, provider or operating condition.
Interfaces and external services can change. Follow the current on-screen controls, check dates and vendor documentation, and verify important results independently before acting on them.
Important: Do not rely on this result alone for purchasing, configuration, security, safety, compliance, contractual or fault-diagnosis decisions. Results can be incomplete, delayed, misleading or wrong. Verify important findings with the relevant provider, manufacturer documentation and an appropriate independent test or qualified professional.
DNS and email
DKIM Validator guide
Inspect a published DKIM key and optionally verify a DKIM-Signature against an unmodified raw message.
Open DKIM ValidatorWhat you need
- Domain and DKIM selector
- Optional complete raw message
How to use it
- 1Copy the selector from the sending platform or message signature.
- 2Enter the domain and selector.
- 3Optionally paste the complete raw message.
- 4Run the validation and review key and signature evidence.
Understanding the results
- A published key confirms DNS availability; cryptographic verification also requires exact original message bytes.
Recommended next actions
- Confirm the selector in the sender portal and rotate weak or revoked keys.
Common problems
- Wrong selectors, folded headers, copied line endings and modified message bodies cause failures.
Privacy and security
- Raw message content remains in the browser; DNS key names are sent for lookup.
Worked example
- Scenario
- Validating selector1
- Example input
- selector1 and example.com
- How to read it
- The tool reports the key type and exact RSA size, then indicates whether supplied message evidence verifies.
Limitations
- Unsupported algorithms and modified source cannot be verified.
Do not rely on one result for a production, security, safety, purchasing or contractual decision. Verify important findings independently.