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Cyber Security

Email Authentication Check

SPF, DKIM, DMARC, and MTA-STS checked via live DNS queries. DKIM scans 18 common selectors. Results show the actual record values: not just pass/fail.

Checks included

  • SPF TXT record presence and policy
  • DKIM: 18 selectors scanned (default, google, k1, selector1/2, sendgrid, mailchimp…)
  • DKIM key type (RSA / Ed25519) and estimated bit strength
  • DMARC TXT record and policy (reject / quarantine / none)
  • DMARC pct coverage and subdomain policy
  • MTA-STS TXT record and enforcement mode

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Cyber Security Scan· cyber security checks only
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TLS · DMARC · DNSSECAI content detectionBlockchain intelligenceGEO / llms.txt