SPF Checker

dns

Parse and validate SPF records for email authentication.

Part of Nexabit Network Utilities — free browser tools by Nexabit IT Solutions. Developer API available for automation.

What this tool does

Parse and validate SPF records for email authentication.

Best for

Validating SPF TXT records before email campaigns or domain onboarding.

Common use cases

  • Audit SPF syntax and included mechanisms
  • Reduce risk of email spoofing misconfiguration
  • Pre-flight checks for Microsoft 365 or Google Workspace DNS

How to use SPF Checker

  1. 1Enter the domain name (e.g. example.com).
  2. 2Review the SPF record, mechanisms, and lookup count.
  3. 3Fix syntax errors or too many DNS lookups before going live.

SPF Checker

Results

Tip: Results open in Visual mode (tables and cards). Use the JSON tab or Copy/Download to export raw output for tickets and runbooks.

Frequently Asked Questions

SPF Checker is a free online tool on Nexabit Network Utilities. Parse and validate SPF records for email authentication.

A valid SPF record is a single TXT record starting with v=spf1, listing authorized senders with mechanisms like include, ip4, and a terminating -all or ~all policy.

Yes. SPF Checker is free in your browser on Nexabit Network Utilities with no account required. The Developer API has separate free and paid plans for automation.

SPF Checker is part of Nexabit Network Utilities, built and maintained by Nexabit IT Solutions.

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dns

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