Free Online SMTP Checker Tool
Looking for a reliable way to test SMTP settings and diagnose email delivery issues? Our Free SMTP Checker Tool is the perfect solution. You can instantly test SMTP server connection, port availability, authentication status, and simulate email delivery — all in one convenient tool.
What is an SMTP Checker?
An SMTP checker (also called an SMTP tester or SMTP test tool) is used to verify whether your SMTP server settings are correctly configured and accessible. With our SMTP test online, you can:
- Test SMTP server connectivity
- Verify SMTP authentication (username & password)
- Choose between Auto, SSL, and TLS security modes
Whether you're managing transactional email systems, testing campaign delivery, or troubleshooting issues, our SMTP checker online helps you verify if the SMTP protocol is functioning properly.
How to Use the SMTP Checker Tool?
Using our SMTP tester is quick and easy:
- Enter SMTP Server – e.g., smtp.gmail.com
- Choose SMTP Port – such as 25, 465, 587, or 2525 (By default SMTP Port 25)
- Select Security – choose Auto, SSL, or TLS
- Enter SMTP Username & Password
- Add From and To Email Addresses – to simulate a test email
- Click “Start Test” – and get real-time diagnostic results
Common Use Cases for SMTP Testing
Our SMTP test tool helps in:
- Troubleshooting email delivery issues
- Validating SMTP credentials and port configuration
- Ensuring your SMTP server is working correctly
Why Use Our SMTP Test Online?
Whether you’re setting up transactional email systems, accurate SMTP configuration is essential — and our SMTP check tool ensures just that.
- Reliable email delivery
- Real-time error diagnosis
- Easy setup with no technical complexity