DKIM Checker

Check a DKIM public key and selector record used to validate cryptographic email signatures.

What is DKIM Checker?

DKIM Checker is an online analysis tool for checking the DKIM public key published by an email provider under a selector. It helps you reach the right data quickly when domain, IP, email, or certificate infrastructure changes.

This page provides a clear definition, usage steps, and interpretation guide. Results can depend on DNS caches, registry privacy, CDNs, network timeouts, and remote service availability. Confirm critical changes with an authoritative provider or more than one resolver.

How does it work?

The request is sent to the appropriate technical source for the input type. The result may include the TXT or CNAME record at selector._domainkey, key availability, and basic formatting signals. Always evaluate the returned value together with its source, timestamp, record type, and intended configuration.

How to use it

Open the tool above and enter the target. Example: selector: google, domain: ornekalanadi.com.
Check the input format and submit the request.
Compare dates, hostnames, priorities, policies, and returned values with the expected configuration.
If you make a correction, wait for the relevant cache or TTL and test again.

How to interpret the results

A technically valid response is not automatically a correct configuration. Investigate unexpected hosts, expired or nearly expired certificates, incorrect IP addresses, missing authorization, and inconsistent DNS records. Back up the current configuration before changing production systems.

Frequently asked questions

What is a DKIM selector?

A selector is the DNS prefix that identifies a particular DKIM key for a domain.

When should a DKIM key be changed?

Rotate keys regularly according to your provider and security policy.

Is DKIM enough on its own?

No. It is best configured together with SPF and DMARC.