That can be achieved by implementing a list exit. Details are in the "Advanced Topics" document here: http://www.lsoft.com/resources/manuals.asp >>> [log in to unmask] 3/15/2007 3:25:52 PM >>> I apologize for being unclear. Right now I have subscribers that can issue commands to the list by emailing [log in to unmask] They post messages to [log in to unmask] For example, if a subscriber wants to change their format to digest they send a SET LISTNAME DIGEST command. If they want to get a list of available archive files they send an "INDEX LISTNAME" command. And so on. I want to remove the ability of subscribers to issue commands to the list server. Once this is done, they should be able to do two things: 1. post messages 2. receive messages. Thanks, -Mike