In the Pro and Enterprise plan of Pobuca Connect, you can add users/co-workers who have different email domain from the one which is set as main inside Pobuca Connect.
In the Free plan of Pobuca Connect, you can add users/co-workers who have the same email domain as the one which is set as main inside Pobuca Connect.
So, if you are in the Free plan and you want people who do not have the main domain on their emails to join your Pobuca Connect, follow these steps:
Sign into Pobuca Connect web app as an Administrator
Click on the Billing & Store option which is located on the left side menu
Upgrade to Pro or Enterprise plan
After activating the Pro or Enterprise plan, invite the ones you want just by typing their email addresses (click here for instructions) or create their accounts from the co-workers panel (click here for instructions).