The files are propagated in the format  you send them, ie the format used
by LISTSERV is the one *you* used. If you don't want to use NETDATA, just
don't use SENDFILE but PUNCH (or  whatever you prefer to use). Of course,
if the Un*x nodes in question are on BITNET and don't understand NETDATA,
it's  basically their  problem; they  can't reasonably  expect the  whole
network to adapt to  them, rather than the other way  around. If they are
behind a mail gateway, it's another matter of course.
 
  Eric