About SMTP Test Tool
SMTP Test Tool checks connectivity for email protocols including SMTP, IMAP, and POP3. It can test STARTTLS, SSL, and authentication paths, helping administrators determine whether a mail connection is reachable and configured as expected. The application provides both a command-line interface and a native graphical interface. When a connection fails, the tool can translate cryptic 5.7.x bounce codes into remediation guidance that IT staff can act on. This combines connection testing with interpretation of common mail-delivery errors, making it useful during email setup or troubleshooting. SMTP Test Tool is distributed as a single static binary, uses rustls rather than OpenSSL, and stores credentials in Windows Credential Manager. It is intended for IT teams diagnosing mail connectivity across Windows and other supported environments. Its functions cover testing, protocol negotiation, authentication, and error interpretation.
Categories
Platforms
Website & Downloads
Trusted package or store listing
Related software
- 360游戏浏览器 — 360游戏浏览器 is a Windows product for discovering games through recommendations across several categories.
- Ablaze Floorp — Ablaze Floorp is a web browser built on Firefox, with an emphasis on privacy and flexibility.
- AccountCheck — AccountCheck helps people who use multiple Outlook accounts choose the appropriate sending account for each recipient.
- AdiIRC — AdiIRC is an Internet Relay Chat client that can connect to multiple servers and offers a highly customizable interface.
- AyuGram Desktop — AyuGram Desktop is a desktop client for Telegram with additional customization and Ghost mode.
- Backup Thunderbird — Backup Thunderbird backs up and restores data from the Thunderbird email client.
