Free tool
Domain email security checker.
Enter a domain and we'll check SPF, DKIM, and DMARC in one pass - live DNS lookups, right in your browser. No email address needed, no data stored.
DKIM has no single DNS record to look up - it lives at a per-provider "selector" address. We check the ~20 most common selectors (Microsoft 365, Google Workspace, and most major email platforms). If your setup uses a custom selector, it may show as not found here even though it's configured correctly - check with your email provider for the exact selector name to be certain.
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We'll walk through what's actually configured, what's missing, and what it would take to close the gaps.