Email subscribers on when a new page is added

Hello. I am currently making a WordPress real estate site for a client. I’m using the Great Real Estate plugin. The way the plugin works is that you make a new page as a child to your listings page and it becomes a property listing. What the client wants is that each time a new property is added it email’s the subscribers of the sites. I can only find plugins that email when a new post is made but not when a new page is made. Can anyone help?

Thanks
Quinton