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SMTP Tester

Quickly test SMTP server configurations and email delivery with ease.

Click a provider to auto-fill common settings

Email Server Settings

Your email server address (like smtp.gmail.com)
Usually 587 for TLS or 465 for SSL
Your login email
Your email password or app password

Email Test Details

Where to send the test email

How to Use

Important Tips
  • Double-check your email server settings
  • Gmail users: Enable 2FA and use app passwords
  • Check firewall if connection fails
  • Some email providers need special settings
  • Always test connection before sending emails

SMTP Tester – Verify Your Email Server Configuration Instantly

Toolsina offers a powerful and easy-to-use SMTP Tester that helps you check and verify your Simple Mail Transfer Protocol (SMTP) server settings in seconds. Whether you’re a developer, system administrator, or business owner, this tool ensures that your outgoing email system works properly and delivers messages reliably.

With Toolsina’s SMTP Tester, you don’t need advanced technical skills—just enter your SMTP details, run the test, and get instant results.

What Is SMTP and Why Does It Matter?

SMTP (Simple Mail Transfer Protocol) is the standard protocol used to send and relay email messages across the internet. Every email you send from your application, website, or email client uses an SMTP server to deliver it to the recipient.

If your SMTP settings are misconfigured, emails may:

Fail to send.

End up in spam folders.

Be delayed or rejected by recipient servers.

Why Use an SMTP Tester?

An SMTP Tester allows you to:

Verify server connectivity and authentication.

Check if your SMTP settings are correct (host, port, encryption, credentials).

Identify delivery issues before they impact your users.

Test new email configurations without sending real messages to customers.

It’s an essential tool for maintaining email reliability and avoiding costly downtime in communication.

How Toolsina’s SMTP Tester Works

Enter your SMTP server address, port, and login credentials.

Choose the encryption type (SSL/TLS or STARTTLS).

Click Test to initiate the connection.

Instantly see whether your server responds correctly and is ready to send emails.

The tool provides detailed feedback, including error messages, so you can quickly troubleshoot issues.

Why Choose Toolsina’s SMTP Tester?

Instant Feedback – Get real-time test results.

100% Free – No sign-up or subscription needed.

Secure Testing – Your credentials are never stored.

Beginner-Friendly – No advanced email server knowledge required.

Works Anywhere – Test from desktop, tablet, or smartphone.

Common Use Cases

Developers – Test email sending from new web apps.

IT Teams – Verify corporate email server health.

Business Owners – Ensure marketing campaigns are delivered successfully.

Email Service Providers – Troubleshoot client configurations.

FAQs

1. Does this tool send a real email during testing?
It can perform a connection and authentication test without sending an actual email, depending on your choice.

2. Is my SMTP password safe?
Yes, Toolsina does not store or log any credentials provided during testing.

3. Which SMTP ports can I test?
Common ports include 25, 465, and 587, but you can test any port your server uses.

Final Thoughts

A functioning SMTP server is the backbone of successful email communication. With Toolsina’s SMTP Tester, you can quickly verify your email server settings, troubleshoot issues, and ensure your messages reach their destination. Reliable email delivery starts with proper configuration—test yours today.