Before downloading mrt, please familiarize yourself with our copyright on the program. Mrt is not free software, and there are restrictions on its use for commercial purposes.

If you want to use mrt, download the mrt Perl script and install it in any convenient place on your system. (Note that with some browsers it may be necessary to hold the shift key down while clicking on the link just above. Otherwise the mrt script will just be displayed as plain text within the current browser frame.)

Note that the mrt script requires three types of user inputs, i.e.:

• A test patterns file describing the exact types of relaying tests you would like to perform
  
  
• A test message file containing the text of the mail message to use when performing relaying tests
  
  
• A set of host names or IP addresses, indicating which specific mail servers are to be tested

If you are interested in performing a comprehensive set of relaying tests that cover most known mail server relaying exploits, you can download and use this test patterns file .

Before using mrt to perform relaying tests, you will also need to develop your own test message file, but you can look at this test message file as a general example of what your own test message file should look like.