DKIM Checker
Check a DKIM selector, record syntax and public key publication in DNS.
Live check · No account required · Results depend on the DNS resolver and network access available to this hosting server.
ABOUT THIS TOOL
What the DKIM Checker tests
DKIM public keys are published under selector._domainkey.domain. Enter the selector used by your mail platform to inspect the corresponding DNS record, key material and common tag-level issues. DKIM selectors cannot be discovered reliably from DNS alone, so the checker requires a selector when testing a specific key.