Check Your Email Infrastructure for Abuse Risks
MailAPI Sentinel scans your domain for open SMTP relays, misconfigured authentication, weak TLS posture, and vulnerable email API endpoints — giving you actionable findings in seconds.
SMTP
Relay Detection
API
Auth Analysis
TLS
Encryption Check
// Process
How It Works
Three steps from domain input to a comprehensive security assessment of your email infrastructure.
Enter Your Domain
Provide the domain you are authorized to test. Optionally include an email API endpoint for deeper API-layer analysis.
Backend Scans Infrastructure
Our engine queries MX records, probes SMTP servers for open relay vulnerabilities, checks authentication requirements, TLS support, and tests the API endpoint for weak access controls.
Review Structured Report
Receive a prioritized security report with an overall risk rating, per-category findings, and actionable remediation recommendations.
About
MailAPI Sentinel
MailAPI Sentinel is a professional email infrastructure security scanner built for security engineers, system administrators, and compliance teams. It surfaces misconfigurations in SMTP servers and email APIs that could be exploited for spam campaigns, phishing, or data exfiltration.
Legal Disclaimer
MailAPI Sentinel is designed exclusively for authorized security testing. You must have explicit written permission from the domain owner before initiating any scan.
Unauthorized scanning of systems you do not own or have permission to test may constitute a violation of computer fraud and abuse laws in your jurisdiction.
Responsible Use
This tool is intended for use by security professionals, pentesters, and IT teams conducting legitimate security assessments. All scan activity is logged. By using this service, you agree to our terms and applicable laws.