SMTP Test Tool

Test your SMTP server configuration and send test emails instantly. Verify email delivery before going live.

SMTP Configuration

Enter your mail server details below

Quick presets:

Email Details

Compose your test email

Connection Testing

Verify your SMTP configuration works before sending actual emails.

Secure Testing

Your credentials are never logged or stored. Tests are isolated sessions.

Instant Results

Get immediate feedback with detailed error messages and server responses.

Common SMTP Ports

25SMTP

None • Default SMTP port

465SMTPS

SSL • Secure SMTP

587Submission

TLS • Modern standard

Quick Tips

  • Use Test Connection first to verify your settings before sending emails
  • Most email providers require App Passwords instead of regular passwords
  • Port 587 with TLS is the modern standard for email submission
  • Your configuration is saved locally (excluding password) for convenience