SMTP Test Tool icon
SMTP Test Tool icon

SMTP Test Tool

Instantly test and verify your email server setup—like Gmail, Outlook, SES—by providing clear real-time feedback on connection, authentication, and delivery status.

SMTP Test Tool screenshot 1

Cost / License

  • Free
  • Proprietary

Platforms

  • Online
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SMTP Test Tool was added to AlternativeTo by Karim Benk on and this page was last updated .

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What is SMTP Test Tool?

A free online tool that allows you to verify your SMTP server setup, test mail delivery, and diagnose issues in real time. It’s compatible with Gmail, Office 365, Amazon SES, SendGrid, Mailgun, and self-hosted SMTP servers—letting you enter host, port, security settings, and credentials, then instantly see live protocol logs and test email functionality

Key capabilities include:

  • Instant connection tests to confirm your server is reachable
  • Real-time logs, so you can follow every handshake step—from login to spool delivery
  • Test email sends, to check that authentication, encryption, and delivery all work smoothly

Whether you’re setting up a new server or troubleshooting email issues post-deployment, SMTP-Test.com gives you clear, instantaneous feedback—no sign-up, no install, just accurate server diagnostics.