DKIM Check
Look up a DKIM public-key record for a domain and selector.
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Enter a host above and press Run to start the check.
About the DKIM Check
DKIM Check looks up a domain's DomainKeys Identified Mail public-key record for a given selector. The record lives at selector._domainkey.yourdomain as a TXT entry containing the public key that verifies cryptographic signatures on outbound mail. Confirming the published key matches your mail provider's selector ensures recipients can validate your DKIM signatures.
How to use
- Enter the domain and the DKIM selector used by your mail provider.
- Run the check to fetch the record at selector._domainkey.yourdomain.
- Verify the public key is present and matches your provider's configuration.
Frequently asked questions
- What is a DKIM selector?
- A selector is a label that identifies which DKIM key to use, allowing a domain to publish multiple keys. It forms part of the record name, as in selector._domainkey.example.com.
- How do I find my DKIM selector?
- The selector appears in the DKIM-Signature header of your outbound email under the s= tag, and is also documented by your mail provider.
- What does the DKIM record contain?
- It holds the public key paired with the private key your mail server uses to sign messages. Receivers use it to verify the signature's authenticity.