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SPF Checker

Validate your SPF record, count DNS lookups against the 10-lookup limit, and catch a permissive +all before spammers do.

  • No signup required — instant result
  • Plain-English issues, warnings, and fixes
  • Optional full report by email
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What this checks

SPF lists the servers allowed to send mail for your domain. This checker reads your v=spf1 TXT record, parses every mechanism, counts the DNS lookups it triggers (the RFC caps you at 10), and flags a permissive +all or a missing all mechanism.

Why it matters

Exceed 10 lookups and SPF silently fails — your legitimate mail starts failing authentication. A +all policy lets anyone send as your domain. This check catches both before they cost you deliverability.

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Want this monitored automatically?

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