SPF Checker

Check SPF records for a domain, including recursive includes, redirects, direct IPs, estimated DNS lookup count, and the effective SPF policy.

Results

No SPF check run yet.

What this tool does

SPF Checker evaluates a domain’s SPF record and recursively follows includes and redirects to estimate DNS lookup count and detect common problems.

When to use it

Check whether an SPF record exists and whether it is too broad or too complex.
Review includes, redirects, and lookup count before publishing SPF changes.
Investigate SPF failures, permerrors, or softfail behavior after delivery problems.

Learn more

Related Tools

SPF Generator

Build an SPF record from common mechanisms and review estimated lookup cost.

Email Header Analysis

Analyze email headers for SPF, DKIM, DMARC, and routing clues.

Email Security Check

Review SPF, DMARC, DKIM, MTA-STS, TLS-RPT, and BIMI together.

How to Troubleshoot SPF Failures: Complete Step-by-Step Guide

A comprehensive SPF troubleshooting guide covering missing records, multiple SPF issues, DNS lookup limits, includes, redirects, and how to fix SPF failures.

How to Check Whether an SPF Record Is Too Complex

A practical SPF troubleshooting guide covering recursive includes, DNS lookup limits, redirect behaviour, and how to simplify an overly complex SPF policy.

How to Fix SPF PermError

A practical guide to fixing SPF PermError, including multiple SPF records, too many DNS lookups, syntax mistakes, and broken includes or redirects.