when we send email or try to telnet to a site that requires reverse lookup to be enabled the connection is refused.

i have the O'Reilly book DNS and Bind and in it are examples of what the reverse zone file should look like. i don't see a line that defines an email server in the example. is there anything special about what that line should like or would you just follow the standard syntax? 1.39.104.192.in-addr.arpa

i've found a file that does the reverse lookup for 127.0.0.1. but, not a file that appears to be configured to do reverse lookup for anything else. nor is there a line in named.boot that would point to such a file.

we did not have this problem, until i changed the external address in our hosts file for the mail server and subnet. we're migrating to a different isp provider so we have a new range of ip addresses. our current isp provider is doing our name resolution and i'm changing the external addressses one at a time. so my host file has a combination of addresses from our current isp provider, and the one were changing over too.