how to setup and connect my mail server with web server in different networks?
i am building my new mail server and my new web server in different networks with different public ip. And i am little bit confused in how to configure and connect my mail server with my domain (web server).
web server ip is: XXX.XXX.XXX.XXX
mail server ip is: yyy.yyy.yyy.yyy
i have attached topology of my network.
any advice will be appreciated.