See section 5.2, 2nd to last item:
http://www.lsoft.com/manuals/1.8d/qs/qs.html#RejectedPost
but more to the point:
http://www.lsoft.com/manuals/1.8e/owner/owner.html#_Toc9154234
At 16:51 10/24/2002 Thursday, Dave Botwin................Tower wrote:
>
>"The enclosed message, found in the SIGMABETA mailbox and shown under
>the spool ID 0088 in the system log, has been identified as a
>possible delivery error notice for the following reason: "Sender:",
>"From:" or "Reply-To:" field pointing to the list has been found in
>mail body."