Get post data from other website in Multisite

Hi!,

I was wondering, is it possible, when creating a standard newsletter on main Multisite site, to get post data from other websites in the same network?

I have two sites installed (main and sub site) and I’d like to operate Newsletter only on main site and be able to put Woocommerce products info from a sub site, which I created as a e-commerce platform.

Thanks and best regards.

BTW, your plugin is great!

https://wordpress.org/plugins/wysija-newsletters/