The 5th Emergency Service

External Exposure Scanner
Free business security check

See what your domain exposes to the internet

Enter your business domain and we will run a safe external configuration review covering email authentication, domain registration and publicly visible certificate hostnames.

Scan in progress…Checking public DNS, SPF, DMARC, MTA-STS policy, inbound SMTP TLS, DKIM selectors, PTR, TLS-RPT, registration data and certificate transparency. SMTP checks can take several seconds.

This public check performs passive DNS, RDAP and certificate-transparency lookups. It does not attempt passwords, logins, exploitation or port scanning. Results expire after 24 hours.

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