SMTP Tester

The SMTP Tester lets you quickly test your email server configuration by sending test emails. This is useful for verifying that PowerMTA or any SMTP server is properly configured and can deliver mail.

How to Use

1. Go to SMTP Tester from the sidebar.
2. Enter the SMTP server details:
   • Server hostname or IP address
   • Port (typically 25, 465, or 587)
   • Username and password (if authentication is required)
   • Encryption type (None, SSL/TLS, or STARTTLS)
3. Enter the From address, To address, subject, and message body.
4. Click Send Test.

Understanding Results

The tester will show you the full SMTP conversation including:

• Connection status – whether the connection to the server was successful
• Authentication result – whether login credentials were accepted
• Delivery status – whether the test email was accepted for delivery
• Server response codes – the raw SMTP response from the server

Common Uses

• Verify a new PowerMTA installation is working
• Test SMTP authentication settings
• Check if a specific port is open and accepting connections
• Debug deliverability issues by examining server responses