Thanks for the reply. I was able to locate and update the site-wide mail template (CONTENT_FILTER) in order to block messages with certain words in the subject field. After making the changes and clicking on update, I ran several messages through the system to test the filter but nothing is happening (message gets delivered). For example a filter parameters as simple as blocking empty subject line doesn't seem to be working. do I need to restart listserv for the change to take effect? Subject:: Action: REJECT Please resubmit your message with a non-blank subject. Thank you! -----Original Message----- From: LISTSERV site administrators' forum [mailto:[log in to unmask]] On Behalf Of Ben Parker Sent: Monday, May 31, 2010 11:20 PM To: [log in to unmask] Subject: Re: global mail template On Thu, 27 May 2010 15:06:14 -0700, "Sakr, Tamer" <[log in to unmask]> wrote: >Hi, I am trying to edit listserv 15.0 global mail template to include filtering based on keywords in the subject field. Is there any way I can revise the global mail template? Where do I find it? There is not a single "global mail template". It might help to explain a bit about what you want to do. You can use the CONTENT_FILTER (mail) template (site-wide) to block certain emails such as 'out-of-office' messages and similar.