Originally Posted by MarcoV
can i change this to another port so i can use the smtp server? and i also like to what files that i need to change.
Theoretically yes, practically no. If you change the port you won't be able to connect to other email servers because they listen on port 25...
You could set up a second server in a data center that listens on a different port (e.g. 443) to pick up your emails and then sends them out on port 25 - but if you have a "real" server in a data center than you don't need the server in your home LAN anymore, i guess...