> If  you are  running  MX V3.3  or  PMDF V4.2,  LISTSERV  will delete  the
> recipients  automatically. Otherwise  the best  is to  wait for  the list
> owners to delete the recipients on their  own. The cost to your system of
> bouncing off  these messages is a  droplet in the ocean  when compared to
> the  cost  of running  5000  jobs  with a  global  lookup  for 272  other
> institutions.
 
Is there documentation someplace of what has to be in the bounce message
in order for LISTSERV to do automatic deletion?  We have a home grown
mail system that could probably generate what's needed, if we know what
it is.