On Tue, 9 Mar 2004 19:48:58 -0500, Bill Verity <[log in to unmask]> wrote: >I'd like to prevent an owner from adding 100k subscribers to a list. >We prefer to handle this load with 10 lists of 10k each and trigger >their delivery by staggered Prime= headers. Is there an exit I could >write to catch this or has someone already figured out how to catch >this? If you run the ISP version of LISTSERV (same binary, different license, enables new capabilities) you can set a max subscriber limit for Lists.