Free security tools
Public DNS and website lookups. No signup. No email address.
Every check here runs on public records only, right in your browser. There is no account to create and nothing to install. Results are a snapshot, not a full audit.
Check allEmail impersonation
Can someone send mail as you? Check SPF, DKIM, DMARC, and more with a public DNS lookup.
Run checkWebsite snapshot
HTTPS, security headers, and DNS for your domain and www, from the browser.
Run checkMail routing
Where your mail goes, and whether your mail server addresses are listed on public blocklists.
Run checkDomain registration
Expiration date, registrar, and who hosts DNS, from public RDAP and DNS records.
Run checkMicrosoft 365 tenant
Tenant ID and .onmicrosoft.com name if published, from public Microsoft endpoints.
Run checkWant help fixing what a check found?
Raulston Consulting Service can review your results and correct the settings for you.