[ Free tool · Generators ]
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)
Enterprise provenance
Why top financial institutions and governments retired their email security dashboards.
Traditional email authentication platforms sell you a dashboard and ask your engineers to do the labour. In high-stakes environments, manual oversight means delayed enforcement, configuration drift and unmonitored shadow domains.
EmailAuth is the agentic email provenance platform. Our agents enforce p=reject, keep third-party senders aligned and move your domains to full RFC 9989 compliance, the new DMARC standard,, with human-in-the-loop auditability.
SaaS · Dedicated tenancy · Air-gapped on-prem · BYOK encryption
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