You cannot do that. The concept of acknowledgement via MAIL or MSG was to
confirm that the  message reached everyone, so all the  peers bother you.
With acknowledgement set  to NO you only get a  one-line message from the
first server.
 
By the way, could the 2-3 sites which run a local LSTSRV-L redistribution
for archival purposes  kindly edit the header to read  "Ack= None" rather
than "Ack= No", so that posters get strictly no message from these sites?
Thanks.
 
  Eric