Free SPF Record Validator
Check any SPF record for syntax errors, DNS lookup limit violations, void lookups, deprecated mechanisms, and full RFC 7208 compliance — instantly and free.
We'll retrieve and analyze the live SPF record from DNS for your domain.
What Does This SPF Validator Check?
Correct v=spf1 prefix, valid mechanisms, proper qualifiers
Must be ≤ 10 per RFC 7208 §4.6.4
Includes resolving to empty responses (≤ 2 allowed)
Flags ptr usage (not recommended by RFC 7208 §5.5)
Identifies SPF macro syntax for dynamic resolution
Full mechanism tree showing nested lookup chains
SPF validation failed?
AutoSPF automatically fixes the 10-lookup limit, keeps your record valid, and re-scans every 15 minutes. Enterprise SLAs, SSO/SAML, audit logs included.
What Our Customers Say
"AutoSPF Flattens SPF Records Seamlessly & Keeps Changes Logged - I am quite pleased with the product"
It does what it promises to do, and does it very well. I appreciate that it keeps a log of changes made, which prevents many mistakes. A client's SPF record would have way too many lookups, but AutoSPF makes that problem go away. The length of the SPF record is typically not the issue; it's the amount of lookups in the record that are. AutoSPF "flattens" the record, automatically expanding the defined lookups to IP addresses or ranges. And it auto-updates the record when the un-flattened lookups change.
Peter J.
President · Small-Business (50 or fewer emp.)
"Helped us go beyond capacity"
AutoSPF did exactly as described, it helped us get past our 10 lookup limit. Afterwards, we hit another limit regarding overall capacity and when contacted, they quickly provided us with a new solution to eliminate capacity issues entirely going forward, so now we can add as many SPF records as needed. They also provided us with a personalized support video explaining their new method in its entirety using our instance as the example.
Verified User
Financial Services · Mid-Market (51-1000 emp.)