I host many different websites using IIS 6 on a server in the DMZ. To allow the users from my AD network access the websites on that server I have to enter a DNS setting directing www to the IP address of the DMZ server. Now, a new organization wants us to host their website on our server but they still will retain their emai server at their location. When I make the DNS changes to allow my users to access the website on the DMZ server any email being sent from our exchange server does not route to their server due to DNS issues. Can anyone tell me what I need to setup on my AD DNS to allow the mail to route to their server.