The enclosed script will send a reply message containing a formatted address list.
What you Need
AppleScript as well as the scriptable Finder. (An install of System 7.5 or later guarantees compatibility, although System 7 Pro may work as well).
Customizing the scripts
At the beginning of the script change the variable settings and enter the names of your services along with the name of the address list you want returned. The address list name can be determined from the "Get Info" command within the ListSTAR Address List Interface.
Configuring ListSTAR
Add a new rule to a listserver service. Have it check the subject field for the command "list users" (or whatever else you choose). For an action, have the rule execute the "Return Address List v1.0" applescript.
If you have any problems or questions, contact StarNine Support <support@starnine.com>. Unfortunately, we cannot support any further customization of this script. See the ListSTAR Scripts ReadMe for more sources of information.