[ Free tool · Generate ]
SPF Flattener
Turn includes into IP ranges to get under the 10-lookup limit.
[ About this tool ]
This SPF flattener expands includes into IP ranges to produce a record under the 10-lookup limit.
How to read the results
- ›Flattened records go stale when providers change IPs.
- ›Re-flatten regularly or use managed dynamic flattening.
Frequently asked questions
What is SPF flattening?
Replacing include: mechanisms with the ip4/ip6 ranges they resolve to, reducing DNS lookups.
Learn more in our guide: SPF (Sender Policy Framework)
[ Get this fixed for me ]
Free expert review of your result
Our team reviews this result and sends you the exact fixes, at no cost.
[ More tools ]
SPF Checker
Validate your SPF record and check the 10-lookup limit.
SPF Generator
List your sending sources and generate a correct v=spf1 record.
DMARC Checker
Look up and explain any domain's live DMARC record.
DKIM Lookup
Verify a DKIM selector is published and the key is valid.
DMARC Generator
Build a valid _dmarc TXT record with guided options.
DMARC Report Analyzer
Upload XML aggregate reports for an instant compliance dashboard.