What tools check DKIM records?
DKIM record verification:
MXToolbox DKIM Lookup: mxtoolbox.com/dkim.aspx - requires domain and selector.
dmarcian DKIM Inspector: dmarcian.com/dkim-inspector - validates key format and content.
Command line:
- dig TXT selector._domainkey.yourdomain.com
- mail-tester.com: Send test email, verifies DKIM signature actually works.
What to verify:
- Record exists at correct selector
- Public key is properly formatted
- Key length is adequate (2048-bit preferred)
- No truncation or formatting errors
- Test after key rotation or adding new selectors.
- Verify your cryptographic seal is properly registered and verifiable.
Need personalized help?
Pick the right DKIM checker for your setup. Open an AI assistant with your question pre-loaded — just add your details and send.
Was this answer helpful?
Thanks for your feedback!