SPF Record Checker
Validate your Sender Policy Framework (SPF) DNS record. Ensure it correctly authorizes your email servers and prevents spoofing.
How the SPF Record Checker Works
The tool performs a TXT record lookup on your domain, parses the SPF string, and recursively checks all "include" statements to ensure you haven't exceeded the 10-lookup limit and that the syntax is perfect.
✅ Key Features
- Syntax Validation
- Lookup Limit Check
- Include Resolution
- Authorized IP Display
Frequently Asked Questions
What is the 10-lookup limit?
SPF protocols limit the number of DNS resolving mechanisms (like "include" or "a") to 10 to prevent denial-of-service attacks. If you exceed 10, your SPF record breaks and emails fail authentication.
Can I have multiple SPF records?
No. A domain must have exactly one SPF record (starting with v=spf1). Multiple records will cause a permanent error and authentication will fail.
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