Are SMTP credentials stored?

No, SMTP credentials are only used for testing and are never stored.

Can I use this tool on mobile devices?

Yes, the SMTP Checker is fully responsive and works on mobile phones and tablets.

SMTP Checker – Test SMTP Server Online

SMTP Checker is a free online tool that helps you test SMTP server configuration and verify whether email sending works correctly. Use this tool to check SMTP host, port, encryption, username, and password before integrating them into your website, application, or email service.

Sample SMTP Configuration Input

Below is an example of SMTP configuration commonly used in modern web applications and frameworks such as Laravel, PHP mailers, and custom email systems. You can copy this format and replace the values with your own SMTP credentials before testing them using the SMTP Checker above.

MAIL_HOST=smtp.googlemail.com
MAIL_PORT=465
[email protected]
MAIL_PASSWORD=your_app_password
MAIL_ENCRYPTION=tls

When using the SMTP Checker, simply map each value to the corresponding input field. For example, MAIL_HOST should be entered as the SMTP Host, MAIL_PORT as the SMTP Port, and MAIL_ENCRYPTION as the encryption type.

How SMTP Checker Works

Our SMTP Checker attempts to connect to your SMTP server using the credentials you provide. It validates authentication, encryption settings, and connection stability, then sends a test email to confirm successful delivery.

SMTP Checker Features

Test SMTP host and port connectivity
Verify SMTP username and password
Check SSL / TLS encryption support
Detect authentication and sending errors
Compatible with Gmail, Outlook, Yahoo, and custom SMTP servers

Why Use Our SMTP Checker?

Incorrect SMTP configuration can result in email delivery failures, spam filtering issues, or authentication errors. This SMTP Checker helps you detect issues early and ensures your email system works reliably.

Frequently Asked Questions

Is this SMTP Checker free?

Yes, this tool is completely free to use.

Does this tool store SMTP credentials?

No. SMTP credentials are used only for testing and are not stored on the server.

Which SMTP servers are supported?

Any SMTP server that allows external connections is supported.

If you are managing multiple email tools, you may also be interested in our online tools and other utilities designed for developers and system administrators.