Here is my configuration. I have 5 public IPs (.248 subnet). The outside interface is set as xxx.xxx.xxx.37. I have an internal network 18.104.22.168. My exchange server is 192.168.15.2 and its Public IP is xxx.xxx.xxx.36.
I want to accept smtp only from Messagelabs that directs our email to the .36 address.
Right now every thing works except incoming e-mail and the VPN. Any suggestions would be helpful. Here is my config.