Hi there. I'm stuck in this and need some help out. I have set up a lab testing environment with Server 2012 and exchange 2013 at home using x.com domain for example. Now I have a dynamic Ip address at home for which I use Dyn DNS provider to resolve my IP address every time it changes with x.dyndns.net example. Also I have bought a internet domain from crazy domains with same name as my internal domain on server which is x.com. All I want to do is link the server 2012 and exchange 2013 to this external domain keeping in mind I have a dyn dns as well instead of static Ip. Also my ISP blocks port 25 for SMTP and can only use port 465 with SSL. Can someone tell me what changes do I need to make on my Server and internet domain to make this up and running. Any suggestion would be appreciated :-) If someone can detail this in easy steps then that would be great as the same setup could be used by other home users to try out and learn.