Cross-platform SMTP / IMAP / POP3 connectivity tester with IT-actionable diagnostics.
smtp-test-tool is a single static binary that lets IT teams verify
SMTP / IMAP / POP3 connectivity, exercise STARTTLS / SSL / AUTH
paths, and translate cryptic 5.7.x bounce codes into IT-actionable
remediation steps. Ships with a CLI and a native GUI in one
download; runs entirely on rustls (no OpenSSL); stores credentials
in the Windows Credential Manager.
| Publisher | StruisICT |
|---|---|
| Version | 0.2.1 |
| Release date | 2026-07-10 |
| License | MIT OR Apache-2.0 |
| Installer type | zip |
| Architecture | x64 |
| Package ID | StruisICT.SmtpTestTool |
winget install --id=StruisICT.SmtpTestTool -ewinget upgrade --id=StruisICT.SmtpTestTool -ewinget uninstall --id=StruisICT.SmtpTestTool -eSMTP Test Tool adds these commands to the command line: smtp-test-tool, smtp-test-tool-gui.
Yes. SMTP Test Tool is free and open-source software released under the MIT OR Apache-2.0 license.
The latest version is 0.2.1, released on Jul 10, 2026.
The download button links to the official installer published on github.com, the same file Windows Package Manager installs. You can verify the downloaded file by comparing its SHA-256 checksum with 4dae00b126096811d39a5ecf1569bc3234055587ac0874c5e6e584b0f423fc0c.
SMTP Test Tool runs on Windows and is available for 64-bit (x64) systems.
Open Settings › Apps › Installed apps, find SMTP Test Tool and select Uninstall. From the command line, run winget uninstall --id=StruisICT.SmtpTestTool -e.
Yes. SMTP Test Tool is available as a portable ZIP archive (smtp-test-tool-x86_64-pc-windows-msvc.zip, 64-bit (x64)) that runs without installation. Copy it to any folder or USB drive and run it from there.
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