Projects / xstress


xstress is a small yet powerful tool to stress test SMTP mail servers. xstress creates multiple threads and sends mail messages with varying subjects, "to" addresses, and body texts. Mail attachments are supported. All the parameters are highly configurable. For example, you can configure the number of threads xstress creates, SMTP timeout, attachment files, "to" address, "from" address, etc.

Operating Systems

Recent releases

  •  19 Feb 2009 18:20

    Release Notes: Mail was not being sent if Authentication info was not specified. Some other minor bugs have been fixed. Some code has been refactored for efficiency.

    •  18 Feb 2009 15:04

      Release Notes: An AUTH PLAIN authentication mechanism was added. A DEBUG option was added, and can be activated both via command line and configuration file. A bug which caused some SMTP servers to reject mails sent by xstress was fixed. The README file was updated.


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