SMTP Tester
Verify SMTP host reachability, TLS, and authentication. Credentials are never stored.
Connecting… (timeout 8s)
Test steps
Security limits
- SSRF protection: Only public hostnames/IPs; private ranges blocked.
- Ports: 25, 465, 587, 2525 only.
- Rate limit: 4 requests per minute per IP.
- Credentials: Used for the request only — never logged, never localStorage.
- Timeout: 8 second socket timeout per connection.
- Use credentials you are authorized to test; do not probe third-party servers without permission.
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