> The enclosed message, found in the TCW2004 mailbox and shown
> under the spool
> ID 697468 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.

This one's covered in the List Owners manual, here:
http://www.lsoft.com/manuals/1.8e/owner/owner.html#_Toc9154234

In practise, IIRC, I think you will also find a "To:" field pointing to the
list address will trigger this error.

Spencer