SPF Checker

dns

Parse and validate SPF records for email authentication.

Part of Nexabit Network Utilities — browser diagnostics by Nexabit IT Solutions. API pricing · Developer login

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 browser-based utility 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.

SPF Checker can be used in your browser without a developer account. Programmatic access via the Developer API requires a logged-in account and an active API plan — see /pricing.

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

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