SPF Information

• Domains with Broken SPF Rules
• .NZ Domains with SPF Records
• SPF Unfriendly Companies

SPF Technical Documentation

• SPF RFC

SPF Validation/Testing

Note: These Validators are not 100% perfect (but the first two get close)

• Spam.co.nz Validation
• Python Based SPF Record Testing Tools
• DNS Stuff Tester
• SEO Consultants SPF Validation
• VamSoft Validator