On 10/10/2006 13:32, Steve Eckard wrote:
> One of our listowners is setting up an announce only list to 
> send to a specific group of people in case of an emergency 
> situation at our University. He wants to know if there is a 
> way to set up the list that only a listowner/administrator 
> could add or delete people from this list (member on the list 
> could not unsubscribe). Can this be accomplished? Thanks.

This question comes up several times a year. This can be done, however, it
requires the implementation of a list exit. The exit must be installed by
the site administrator. Individual lists can then be configured to use the
exit. See Chapter 5 of the LISTSERV Developer's Guide for a detailed
discussion of list exits

I have a list exit which will reject signoff requests, and another which
will reject both signoff requests and subscription option change requests,
so a subscriber can neither leave the list nor set his/her subscription to
NOMAIL. These exits are in production on LISTSERV 1.8e on Solaris 8. I am
willing to share the code, but I cannot provide any assistance for
implementation, or for porting the code to other versions and/or platforms.
All the standard disclaimers and caveats apply.

-- 
Paul Russell, Senior Systems Administrator
OIT Messaging Services Team
University of Notre Dame
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