The EXIT= keyword in a list header identifies a software module that is
invoked by LISTSERV(r) during the processing of various events related
to the list, like join or leave. The module can do all sorts of things,
but of interest in the current context is it can prevent completion of
the join/leave request.

Only a site administrator can activate this keyword.

As for the requirement, even if an email message arrives to your inbox,
nobody can force you to open and read it - but some organizations do
make rules about mandatory list membership.

On 3/18/2017 8:17 PM, Ian Fairclough wrote:
> Dear LSTOWN-L readers,
>
> Although I've never had occasion to moderate one, surely some lists must be set up so that people don't unsubscribe, whether willingly or inadvertently.  This would apply to work-related lists that a person is required to read as part of their job.  The list owner would want to prevent people from unsubscribing so that they don't miss important announcements, instructions, and the like.
>
> Is this what is meant by:
> EXIT= keyword
> Would that line, exactly so, be what is included in the list header?
>
> In any case, I suppose that people would be able to SET NOMAIL and get around the requirement!
>
> - Ian
>
> Ian Fairclough
> Cataloging and Metadata Services Librarian
> George Mason University Libraries
> [log in to unmask]

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