This option allows a site administrator to set an absolute limit on the number of members who can subscribe to a mailing list. The list itself will still function when the list is
reached, but no new members will be allowed on.
This feature is useful for lists where the site administrator wants to set a limit on the list administrator of the size of the list.
This feature is only visible if you edit the mailing list through the Site Admin / Mailing Lists / Edit Mailing List button, and is not visible through the List Admin / List Info interface.