I have 1 server with one external IP address. I just purchased a URL with DynDNS and I added a wildcard hostname to it so it will send everything to my server. The thing is, I have Kerio mail server and IIS. With both of these there are servers on ports 80 and ports 443. I have two NICs, so I can set kerio to only accept requests from 1 NIC and set IIS to accept requests on the other. But how do I make it so that kerio is on a subdomain. For example: if a user went to example.com it would go to my IIS site on port 80 but if they typed in mail.example.com, it would go to the kerio site on port 80.