[Exim] Bounce backs with no original message

hello,

my bounce backs do not include the original message,
what have i missed out..?
This message was created automatically by mail delivery software (Exim).
below is what i get

rgds

-----------
A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

  test@???
    unrouteable mail domain "test.co.ng"

------ This is a copy of the message, including all the headers. ------