SPF, DKIM & DMARC Checker

Free online SPF, DKIM & DMARC Checker. No sign-up needed, and it runs in your browser.

Processed on your device

Check a domain's email security records — SPF, DKIM, DMARC and MX — and get plain-English fixes for anything wrong.

Missing or broken SPF, DKIM and DMARC records are the main reason emails land in spam, and they let others send fake email in your name. Microsoft 365 uses the DKIM selectors selector1 and selector2; Google Workspace uses google.

How to use

  1. Add your text or file.
  2. Adjust the options if needed.
  3. Copy or download the result.