>Currently the list header has 'Errors-to= owner' but that doesn't
 >appear to be all that needs to be done.  Users are posting messages
 >and they are receiving the bounce messages and not the owner of the
 >list.

That is probably a bug in the receiving mail server code -- apparently it
is NOT using the RFC821 MAIL FROM:<OWNER-listname@listhost>
address.  Nothing you can do about that, other than set subscriber to
DIGEST of INDEX (or just DELETE).

/Pete