I would like to thank all the  people who sent me examples of recent duplicate
postings from  MAIL-L (or was  that XMAILER?). However,  this is not  the same
problem as the one I was referring  to - this one is perfectly understood, and
there is  nothing I  can do  about it. The  problem is  that for  some reason,
MAILER "forgets" to  punch the RFC822 header  from time to time.  That is, you
get a note with just the 'Received:' tag  that it has added, a blank line, and
the body  of the  mail. Since  I have  already seen  such "maimed"  headers on
private mail items, I  know that this is not LISTSERV  forgetting to punch the
headers when it  sends the note to  LISTSERV (besides which, if  that were the
case, MAILER would not  accept the note). Anyway, LISTSERV gets  a note from a
peer list  with the inter-peer  headers lost (in fact  it doesn't even  have a
'From:' field),  and must  choose between  discarding it  (in which  case some
recipients of the list wouldn't see  the message) and re-distributing it a new
a item, in  which case some people will  get a duplicate. I chose  to code the
latter, which is why you may get two  copies of the note, one showing its real
origin and the other one from  [log in to unmask] In the case of POLYGRAF,
the headers were identical, with the exception of the 'Received:' tags.
 
  Eric