What might cause listserv keep sending messages back to itself on the
following list.  There used to be no problem with the list.  And the header
has not been changed.

Backgroud information:
A subscriber will send out a message, I'll approve it, and it will appear on
the list.  But for some reason, that same message will be submitted by
[log in to unmask] for approval several more times.  The subscriber
will then get several automated rejection messages from the listserv, saying
that since this is a duplicate message, it will not be distributed.  This is
happening with different subscribers.

Below is an example of the duplicate message.

>From: "L-Soft list server at SOME University (1.8d)"
><[log in to unmask]>
>To: <my email address>
>Sent: Wednesday, August 02, 2000 6:00 AM
>Subject: CORGI-L: approval required (F5650EFE)
>
>
> > This  message  was originally  submitted  by  [log in to unmask]
>to  the
> > CORGI-L list at LISTSERV.SOME.EDU. You can approve it using the "OK"
>mechanism,
> > ignore it, or repost an edited  copy. The message will expire
>automatically and
> > you do not need to do anything if  you just want to discard it. Please
>refer to
> > the list owner's guide  if you are not familiar with  the "OK"
mechanism;
>these
> > instructions  are  being  kept  purposefully  short  for  your
>convenience  in
> > processing large numbers of messages.
> >

Any help would be greatly appreciated.

Bing
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