SPF & DKIM Checker

Check SPF and DKIM records for any domain. Validate email authentication setup to improve deliverability and prevent spoofing. Free tool.

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SPF & DKIM Checker queries DNS TXT records to validate your domain's email authentication setup. It parses SPF records to verify sending IP ranges and third-party includes, checks DKIM public keys for common selectors (default, google, mail, etc.), and detects DMARC policy records — giving you a complete email deliverability health check.

How it works

  1. 1Enter your domain name
  2. 2Click Check SPF & DKIM
  3. 3Review SPF record validity and mechanism breakdown
  4. 4See DKIM key status for common selectors
  5. 5Check DMARC policy if present

Who uses this tool

  • ✓Email admins verifying authentication setup after changes
  • ✓IT teams diagnosing email ending up in spam folders
  • ✓Domain owners setting up a new email provider
  • ✓Security teams auditing domains for anti-spoofing protection
  • ✓Agencies configuring client transactional email infrastructure

Frequently Asked Questions

What is SPF?
SPF (Sender Policy Framework) is a DNS TXT record that lists which mail servers are authorized to send email for your domain.
What is DKIM?
DKIM (DomainKeys Identified Mail) adds a cryptographic signature to outgoing email that receiving servers can verify against a public key in DNS.
What is DMARC?
DMARC ties SPF and DKIM together with a policy that tells receiving servers what to do when authentication fails (none, quarantine, or reject).

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