SPF Analyzer
Free SPF Record Analyzer
Real recursive DNS lookup counting against RFC 7208's 10-lookup limit, syntax validation and flattening recommendations.
SPF Analyzer
Syntax validation, recursive DNS lookup count and flattening recommendations.
Enter a domain above to run a real, live check.
Capabilities
What it checks
Recursive lookup count
Follows every include: and redirect= chain with real DNS queries, not an estimate.
Mechanism breakdown
Every qualifier, mechanism and value parsed and shown individually.
Flattening guidance
Flags records approaching the 10-lookup limit before they start failing.
Why use it
Benefits
- Catch an SPF PermError before it starts silently rejecting mail.
- Understand exactly which included provider is consuming your lookup budget.
- Export the full analysis as JSON for a change record.
FAQ
Frequently Asked Questions
RFC 7208 caps SPF evaluation at 10 DNS lookups (include/a/mx/ptr/exists/redirect each cost one, recursively). Exceeding it is a permanent error and receiving servers may reject your mail outright.