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SPF / DKIM / DMARC Checker

Check SPF, DKIM, and DMARC records using DNS TXT lookup.

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SPF / DKIM / DMARC Checker

Check email authentication records via DNS TXT: SPF, DKIM, and DMARC.

If you don’t know your DKIM selector, try leaving it blank first (we’ll try common selectors).

About SPF / DKIM / DMARC Checker

Understand what this tool checks and how to use it effectively.

What this tool does

SPF / DKIM / DMARC Checker helps you quickly inspect domain-level signals without installing software. It’s designed for fast checks during audits and troubleshooting.

Why it matters

Domain configuration impacts security, deliverability, and SEO. A small misconfiguration can lead to trust issues, indexing problems, or email failures.

  • Spot misconfigurations early during audits.
  • Confirm HTTPS, redirects, and DNS settings.
  • Improve trust and technical SEO hygiene.

Common use cases

Typical use cases include:

  • Website migrations and domain moves.
  • Security hardening checks (SSL, DNS).
  • Email authentication verification (SPF/DKIM/DMARC).

FAQ

Is this tool free to use?
Yes. It runs on SEOlust without requiring any account.
Do you store my input?
No. Inputs are processed to generate results and are not intended to be stored.
Does it work on mobile?
Yes. The layout is responsive for phones, tablets, and desktops.

Related tools

Pro tip: pair this tool with Domain Authority Checker and Domain Age Checker for a faster SEO workflow.