smtp4dev

smtp4dev is an excellent tool for developers and testers looking for a free solution to simulate an SMTP server for their software. Developed by Microsoft, the program is particularly suitable for those involved in testing/debugging software that generates email. The latest version, 2.0.10, offers a polished experience and comes in the form of the smtp4dev.exe file. It is compatible with Windows 7, 8, 10, and 11, ensuring broad usability across many systems.

One of the standout features of smtp4dev is its ability to sit unobtrusively in the system tray, while not actually delivering the received messages. The received messages can be quickly viewed, saved, and the source/structure inspected, giving you powerful tools to quickly identify issues. This makes it indispensable for anyone working in the Communication category, specifically within the E-mail Tools subcategory.

Available under a Freeware license, smtp4dev emphasizes accessibility and ease of use. For users still running older operating systems or those who need backward compatibility, other versions such as 2.0, and 1.0 ensure that you have a version that fits your setup.

Pros:

• Free to download and use.
• Lightweight and sits unobtrusively in the system tray.
• Versatile across multiple versions of Windows 7/8/10/11.
• Excellent for testing/debugging software that generates email.
• Developed by the reliable name of Microsoft.

Cons:

• Limited to Windows operating systems, excluding others like macOS or Linux.
• Does not actually deliver emails, which may limit use cases outside of debugging and development.

You may want to check out more software, such as PSPOP3 Inspector, NetZero or MQ Visual Edit, which might be related to smtp4dev.