Security checks for your domain
No login. No account. Enter your domain and get results in seconds.
SPF Record Checker
Verify who is authorized to send email from your domain. Prevents email spoofing.
Check SPF →DKIM Checker
Check your email cryptographic signing. Proves emails actually came from you.
Check DKIM →DMARC Checker
Inspect your DMARC policy. Controls what happens when email authentication fails.
Check DMARC →Email Blacklist Checker
Check if your domain or IP is on spam blacklists that could block your emails.
Check Blacklists →Domain Expiration Checker
Find out when your domain expires. Expired domains can be hijacked by attackers.
Notify me →SSL/TLS Checker
Verify your website certificate is valid, trusted, and not close to expiry.
Check SSL →MX Record Lookup
Inspect your mail exchange records and check for misconfigurations.
Notify me →HTTP Security Headers
Check if your website sets critical security headers that protect visitors.
Check Headers →DNS Health Check
Full DNS configuration review — propagation, TTLs, and common misconfigurations.
Notify me →Open Port Scanner
Find unintentionally exposed services and network ports on your domain.
Notify me →Subdomain Exposure Checker
Discover forgotten subdomains that could be vulnerable or misconfigured.
Notify me →Dark Web Breach Checker
Find out if your business email domain appears in known data breaches.
Notify me →Exposed Credentials Checker
Check if employee email addresses have been found in credential dumps.
Notify me →M365 Tenant Detection
Identify if your domain is running Microsoft 365 and check basic configuration.
Notify me →Legacy Auth Exposure Checker
Detect if your M365 tenant allows legacy authentication — a common attack vector.
Notify me →