A convenient Windows form-based tool to

• create messages with attachments
• send a message multiple times in different threads
• save sent messages
• import your own messages
• edit messagess
• remail existing messages
• test any mail server via an SMTP command line

For a detailed explanation of the tool have a look into the wiki.

1. Download the newest version here.

2. Extract it anywhere on your hard disk.

3. To start simply open SMTPtestTool.exe

.NET Framework 4

If you encounter a bug or if you have an idea for a useful enhancement or additional feature (not matter if it's just a small detail or huge change) just open up an issue.

The tool was tested with different versions of Sendmail, Postfix and Exchange. Let me know if you find an MTA which is not compatible.

Here you can find a collection of some useful .eml templates. Tell me if you have an idea about any other templates which may be helpful for others as well.

SMTP Test Tool is licensed under the MIT License
Copyright (c) 2015 - 2016 Georg Felgitsch (@georg.felgitsch)