in the LISTSERV(TM) list owner's manual, release 1.8c it says: 3. The FILTER= list header keyword. You can filter individual users (no wildcards) from subscribing and/or posting to your list by adding them to the Filter= list header keyword. For instance, if you have a list called MACTALK-L and you want to discourage redistribution lists from using the same name as your list, you can add * Filter= Also,MACTALK-L@* Which seems to contradict itself.. ? Can wildcards [meaning *] be used with filter= in the header? ........Cleo [log in to unmask]