Francisco,
 
    As the POSTMASTER of your LISTSERV, you can use the DELETE command
to remove  any user from any  list.  The syntax is  "DELETE <listname>
<user>@<node>", and the <node> will  default to the one you're sending
the message  from if  you leave it  off.  There is  a special  case to
handle  the  problem  you're  seeing: specify  the  <listname>  as  an
asterisk ("*"), and  the DELETE will be applied to  every list on your
LISTSERV.  Also, in the coming release (1.5n), there will be a NETWIDE
option, to  remove a  user from  every list  on every  LISTSERV.  This
facility will  be limited  to valid  Node Administrators,  for obvious
reasons.
 
Ross Patterson
Rutgers University