DKIM Record Checker

A missing or broken DKIM record drags down your deliverability
Make sure your emails are signed and verifiable for your domain.

What Is DKIM?

🔐 Digital Signatures

DKIM (DomainKeys Identified Mail) provides a digital signature that verifies emails weren't altered in transit and confirms they came from your domain.

🔍 Selector Detection

Our checker scans 25+ common DKIM selectors and analyzes your SPF record for email service provider clues to find your DKIM configuration.

✅ What We Check

  • DKIM record existence for common selectors (default, google, selector1, k1, etc.)
  • Public key presence and format validation
  • Key type and algorithm verification (RSA, ed25519)
  • Record syntax and structure validation
  • Service provider specific selectors based on your SPF record

💡 Don't Know Your DKIM Selector?

No problem! Our checker automatically scans for common selectors. To find your specific selector:

  • Check your email headers for the "DKIM-Signature" field (s= parameter)
  • Check your email service provider's documentation
  • Look for TXT records containing "_domainkey" in your DNS