On Tue, 1 Jun 2010 14:09:32 -0700, "Sakr, Tamer" <[log in to unmask]> wrote: >For example a filter parameters as simple as blocking empty subject line doesn't seem to be working. >>Subject:: >>Action: REJECT Please resubmit your message with a non-blank subject. Are you sure your message in fact had a blank Subject: line? I'm not sure if a <space> char counts as 'empty' or not. Try another filter more certain to work, such as From: [log in to unmask] Action: REJECT Should reject msg from me >do I need to restart listserv for the change to take effect? No. The filter should be effective as soon as you click on the 'update' button.