EMAIL SECURITY TOOL
Check SPF, DKIM and DMARC
Inspect the DNS records that protect a domain from spoofing and delivery problems.
Email authentication results
What this checker tests
It checks the four DNS areas most often involved in spoofing protection and mail-delivery failures.
- SPF: verifies that exactly one SPF policy is published.
- DKIM: checks the public key at the selector supplied by your mail provider.
- DMARC: identifies missing, monitoring-only, quarantine, or reject policies.
- MX: confirms that mail exchangers are published.