Enter your domain. We run a free security scan — checking email authentication, SSL certificate, HTTPS enforcement, and security headers in about 15 seconds.
No signup · Results in ~15 seconds · 5 free scans per hour
Leonidas configures SPF, DMARC, DKIM, and security headers as part of every managed IT and cybersecurity engagement. Florida Panhandle businesses only.
Seven areas: MX email records, SPF anti-spoofing policy, DMARC enforcement, DKIM email signing, SSL certificate validity, HTTPS redirect enforcement, and security response headers (HSTS, X-Frame-Options, X-Content-Type-Options). All checks use real DNS lookups and live HTTP requests against your domain — nothing simulated.
Yes, completely free with no signup required. Enter your domain and get results in about 15 seconds. The scan is rate-limited to 5 scans per hour per IP to prevent abuse.
Without SPF and DMARC, anyone can send email that appears to come from your domain — a technique called email spoofing. It is used in business email compromise (BEC) attacks, the number one cybercrime by dollar loss per the FBI IC3. It also degrades your email deliverability over time.
Fix email security first: SPF, DMARC, and DKIM together prevent spoofing and improve deliverability. SSL and HTTPS redirect come next since they affect every site visitor. Security headers round out the hardening. Leonidas configures all of these as part of every managed IT and cybersecurity engagement.
Each failed check is a real attack surface that adversaries actively exploit against small businesses. Missing DMARC means spoofed emails reach your employees. An expiring SSL cert locks visitors out of your site. Missing HSTS exposes sessions to downgrade attacks. These are the actual entry points used in real SMB compromises.