We are haviing to rebuild after a major server crash. Our Excahnge 5.5 is alive and well, but have not yet rebuilt dns: mail is coming in, but noone can access it. Is there a way to have a tempoary message sent with rejection of mail? My plan is to add 0.0.0.0 subnet 0.0.0.0 in the list of rejected domains. Is there a better way? Thanks.