Networking tools

SMTP Tester

Test SMTP connectivity, authentication, and email delivery.

Connection Ready

SMTP Server Port SMTP Username SMTP Password Sender Email Recipient Email Email Subject SSL/TLS Mode Email Body

Result Idle

Run a test to see the SMTP response.

Test SMTP connectivity before blaming the application

The SMTP tester checks server connection settings, authentication, TLS behavior, and mail delivery responses. Use it to validate host, port, encryption, username, password, and sender details outside your app.

It is useful for diagnosing new mail providers, firewall restrictions, relay rules, credential issues, and production incidents where logs do not clearly show the SMTP failure.