To add new users to an existing domain or to add your list of valid users to a newly added domain, you will first login to the Mailprotector console at https://console.mailprotector.com
Click the “Users” link located either at the top of the page or on the right hand side of the page.
From the "Users" page click the “ADD USER" button found in the toolbar at the top of the page.
Finally, enter the required information and click the “Add” button at the bottom of the form. Once you click the Add button you can choose to stay in the form and add more users, or you can click the button that says "I'm done" , which closes the form and updates the users table to show that it now contains the users you added.
Important: Make sure all valid addresses have been added to your domains user list. All other addresses are rejected at our perimeter as “Invalid recipient”.