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]