A list exit affects only list-related traffic. List exits can be used in
many ways. In the context of this discussion, a list exit can be used to
prevent a subscriber from changing options on that list, or unsubscribing
from that list. It could probably be used to reject other commands which
are specific to that list. I doubt that it could be used to prevent
commands which are not related to that specific list. This would include
commands, such as 'thanks', 'lists', 'help', and other general commands.

Search the list archives for messages where the subject contains the word
'exit' and the author's address is [log in to unmask] I posted some messages
on this subject a few years ago, when the administration asked us to find
a way to prevent faculty, staff, and students from changing options or
unsubscribing from mandatory lists. If the list archives do not contain
copies of the code, I can provide copies of the code. The exits are written
in perl. We use them in LISTSERV 1.8e, running on Solaris. I have no idea
whether they will work with later versions, or on other OS platforms.

Check the LISTSERV Developer's Guide for detailed documentation about
list exits.

-- 
Paul Russell, Senior Systems Administrator
OIT Messaging Services Team
University of Notre Dame
[log in to unmask]


On 3/15/2007 18:02, Kevin Parris wrote:
> 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
>