I have two mail exchangers for two domains: mydomain.com mail.mydomain.com 192.168.40.134 mail2.mydomain.com 192.168.40.131 mydomain.net mail.mydomain.net 192.168.40.131 mail2.mydomain.net 192.168.40.134 My question: can I make a reverse lookup zone 40.168.192.in-addr.arpa that will resolve all the above names to the ip address? Thanks, Tom