SPF Checker - Validate SPF Records for Email Authentication

Check SPF records for email authentication. Validate syntax, count DNS lookups, detect third-party services, and get best practice recommendations for email security.

Key Features

  • SPF record validation
  • DNS lookup counter (10 lookup limit)
  • Third-party service detection
  • Syntax error detection
  • Best practice recommendations

Use Cases

  • Email authentication setup
  • SPF record optimization
  • Email deliverability fix
  • Domain security hardening

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SPF Checker

Check SPF (Sender Policy Framework) records for email authentication. Validates syntax, counts DNS lookups, detects services, and provides best practice recommendations.

Domain Name

Enter a domain to check its SPF policy. Example: google.com, github.com

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About SPF Checker

SPF (Sender Policy Framework) authenticates email senders by specifying authorized mail servers. This comprehensive tool validates syntax, counts DNS lookups (max 10 per RFC 7208), detects third-party services, resolves include chains, and provides best practice recommendations. Proper SPF configuration prevents email spoofing and improves deliverability.