LISTSERV could not GUESS that "cc: xxxx" means "cc: xxxx@SLACVM". This is an
invalid  RFC822 address,  which it  thought to  be a  local node  address with
missing nodeid.  The only  other alternative  would have  been to  discard the
invalid  address  altogether, and  then  you'd  have  complained that  it  was
missing.
 
  Eric