Email Security

SPF Flattener

Expand nested SPF includes to understand the full sender footprint and reduce lookup overhead.

About SPF Flattening

Flattening helps reveal the final sender IP and include chain behind an SPF record. It is useful when troubleshooting lookup limits or cleaning up legacy email providers.

Why teams run this check

• Expand nested include chains
• Estimate total lookup pressure
• See final sender coverage clearly
• Prepare for a safer SPF simplification

What to review

• Flattened record output
• Included providers and networks
• Potential lookup-limit pressure
• Suggested cleanup or simplification steps

Use the free public result to review signals quickly, then move into the full workspace for continuous monitoring and deeper evidence.

PRO

Nodes Observed12

Resolved Nodes11

Dual-stack Coverage4 / 12

Refresh Window5m

PREVIEW

warningDKIM key strengthreview

errorMTA-STS missingfix

check_circleTLS-RPT not configuredinfo

PRO

PREVIEW

Real-time alertsDISABLED

Cadence—

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PRO

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