Hello; Is it possible to run Smartermail behind a firewall using NAT? I currently am running a smartermail install like this, but I am using an external gateway to send email through. We are getting a new internet connection soon, so I am preparing for it. With this new connection I will finally be able to have an external IP that has rDNS and PTR setup properly. However we are implementing the new internet connection with a plan to no longer use DMZ. I'm wondering if I can manually edit the xml to add the new external IP and still keep Smartermail behind NAT. Anyone have a similar setup?