On 5 Nov 2003, at 10:41, Paul Russell wrote: >Several entities within the University maintain lists to which subscription is, >in essence, mandatory. I have been explicitly asked whether it is technically >possible to prevent subscribers from leaving these lists. Has anyone implemented >a list exit to either prevent signoff or require owner approval for signoff? No. You are asking for a specific (list exit) solution for the good reason that, beyond making the subscribers sign a piece of paper that tells them to "stay on or else", it's a tough question. At least for me it seems tough ;-) Not having seen the "smart" solution here are a couple of lame suggestions. If these were announcement only lists you could put them on under odd domains, eg: [log in to unmask] would go on as [log in to unmask] on the VALIDATE=Yes list and then you could (system jock level) serve them off. Or, if they need to post then you could put them on as [log in to unmask] and set them to NOMAIL, followed by a second subscription eg [log in to unmask] and have the routing for that entry on that machine relay it to the correct address without mentioning the intermediate address. -Kary