Breach Horizon
Tools index

Cybersecurity tools

Static, SEO-focused landing pages for practical security checks and remediation paths.

Email Security

BIMI Checker

Assess BIMI DNS readiness and prerequisites for brand indicators in supported mailboxes.

Domain
Email Security

DKIM Checker

Understand DKIM selector, signing, and DNS record readiness for common SMB mail platforms.

Domain and selector
Email Security

DMARC Checker

Check whether a domain has a DMARC record, what policy is active, and what to fix next.

Domain
DNS

DNS TXT Audit

Review public TXT records for security, verification sprawl, and stale vendor records.

Domain
Exposure

Exposure Score Tool

Score a domain across email authentication, TLS, and browser security headers before attackers or insurers check it.

Domain to scan
Email Security

MTA-STS Checker

Check whether a domain publishes MTA-STS and TLS reporting records for safer mail transport.

Domain
DNS

MX Record Checker

Validate mail exchanger records, provider alignment, and common delivery-risk patterns.

Domain
Web Security

Security Headers Checker

Identify missing browser security headers such as CSP, HSTS, Referrer-Policy, and frame protection.

URL
Email Security

SPF Checker

Review SPF records for missing includes, lookup-limit risk, and sender authorization problems.

Domain
Attack Surface

Subdomain Exposure Check

Create a first-pass inventory of public subdomain risk and takeover review priorities.

Domain
Web Security

TLS / SSL Checker

Check certificate validity, HTTPS redirect behavior, HSTS readiness, and modern TLS posture.

Hostname
DNS

WHOIS Domain Check

Review public domain registration signals, expiry awareness, and ownership hygiene considerations.

Domain