Well, try  to write a  program to recognize  this (easy) and  extract the
right address to delete. Then run your program on a couple hundred sample
delivery errors  from various sources and  see how many times  it deletes
the wrong user,  or nobody at all.  Then see how often it  deleted a user
for a temporary  error. LISTSERV only processes  formatted delivery error
reports like those  generated by LMail, PMDF V4.2 and  MX V3.2 and above.
With these reports both the address and the temporary/permanent nature of
the error can be determined safely.
 
  Eric