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Free email configuration test

Mail DNS Checker

Inspect your domain's mail servers, SPF, DKIM and DMARC records. Find common setup problems without sending an email or creating an account.

DKIM requires the selector provided by your email service (for example, selector1 or google). Without it, DKIM cannot be verified.

What do these records mean?

MX routes incoming email. SPF lists authorized sending systems. DKIM publishes a key for signature verification. DMARC defines how receivers should handle failed authentication and where reports go.

Privacy & limitations

Lookups run from your browser using Google's public DNS-over-HTTPS resolver. The domain and optional DKIM selector are sent to that resolver. No email messages are accessed. We do not store lookup history.