SPF Record Checker

Analyze and validate SPF (Sender Policy Framework) records for email authentication and anti-spoofing protection.

Check SPF Record

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About SPF Records

SPF Qualifiers

+Pass: Authorized to send
-Fail: Not authorized to send
~SoftFail: Probably not authorized
?Neutral: No policy

Understanding SPF Results

  • Valid SPF: Record follows proper syntax and rules
  • Invalid SPF: Syntax errors, missing v=spf1, or rule violations
  • DNS Lookups: Count of mechanisms requiring DNS queries (limit: 10)
  • Void Lookups: DNS queries that return no results (should be minimized)

Common Mechanisms

  • a: Authorize A record IPs
  • mx: Authorize MX record IPs
  • include: Include another domain's SPF
  • ip4/ip6: Authorize specific IPs
  • all: Matches all remaining IPs

Best Practices

  • Keep DNS lookups under 10 to avoid exceeding limits
  • Use specific IP addresses when possible to reduce lookups
  • End your SPF record with -all for strict policy
  • Regularly audit and update your SPF record
  • Test changes in a staging environment first

Complete SPF Record Analysis & Email Authentication Tool

Our advanced SPF (Sender Policy Framework) checker provides comprehensive analysis of your domain's email authentication records. Validate SPF syntax, check DNS lookup limits, identify void lookups, and ensure proper email security configuration to prevent spoofing and improve deliverability.

SPF Checker Features

  • ✓Complete SPF Validation: Comprehensive syntax and policy analysis
  • ✓DNS Lookup Counting: Track and optimize DNS query limits
  • ✓Void Lookup Detection: Identify inefficient SPF mechanisms
  • ✓Mechanism Analysis: Detailed breakdown of all SPF components
  • ✓Include Chain Tracking: Monitor nested SPF record dependencies

Email Security Benefits

  • •Anti-Spoofing Protection: Prevent unauthorized email sending
  • •Improved Deliverability: Enhance email reputation and delivery rates
  • •Compliance Verification: Meet email authentication standards
  • •Security Monitoring: Regular SPF record health checks
  • •Domain Reputation: Protect your brand from email abuse

Understanding SPF Records

SPF Mechanisms

  • a: Authorize domain's A record IPs
  • mx: Authorize domain's MX record IPs
  • include: Include another domain's SPF policy
  • ip4/ip6: Authorize specific IP addresses
  • exists: Check if domain exists in DNS
  • all: Default action for unmatched IPs

SPF Qualifiers

  • + (Pass): Explicitly authorized to send
  • - (Fail): Not authorized, reject email
  • ~ (SoftFail): Not authorized, but don't reject
  • ? (Neutral): No policy, neither pass nor fail

Free SPF Record Checker & Email Authentication Validator

Analyze your domain's SPF records with our professional-grade tool. Check SPF syntax, validate mechanisms, monitor DNS lookup limits, detect void lookups, and ensure optimal email authentication configuration. Perfect for email administrators, security professionals, and domain managers.

SPF CheckerEmail AuthenticationAnti-SpoofingDNS AnalysisEmail SecurityDomain ProtectionSPF ValidationEmail Deliverability