By habit and preference, I tend to use quiet serve <address> off simply because on VM, the instant I suspect a problem, I can drop down to the command line and enter " cms tell listserv ....... " which effectively 'pauses' processing for that user while I do some checking. ( If legit, it is fast and easy to undo, output that was passed to me can be forwarded to it's original destination ) A site filter involves ( I believe ) an update of the LOCAL SYSVARS ? Are there any performance considerations that would make a site filter preferable to using serve-off ?? - mike