Communication between two different computers with two different apps
===

I have two windows computers that are both connected to the internet either through wifi or a 4G-LTE modem.  

The first computer sends emails programatically to recipients when certain events occur that are related to my engineering project.

The issue comes with the second computer.  I want to be able to create a program that will change certain things such as the email recipient list that the first computer is using to send emails.  

Two C# applications on two different computers connected to the internet, how to communicate between these?  Any suggestions would be awesome.  I hope I explained enough.  



