This service is in the Email | Webmail menu.

To access this menu, enter the admin's Username and Password as shown in the next image.

In the first appearing screen, we can visualize any incoming or outgoing e-mails. We can compose, send, check the inbox, and so on, as we would do in any webmail client.

In order to grant any authorized user access to the Webmail interface, we must first create the users and allow them the correct permissions in the System | Users menu.