MangoApps email notifications can be configured for Teams(Departments, Groups, Projects) however the email notifications cannot be configured at the individual team level.
If a user wish to receive notification only for certain team and not from all the teams, here is a work around :-
First the user need to pin the team which he wants to receive the notification for. Refer the article https://www.mangoapps.com/help/pinning-content-in-mangoapps to pin a team.
Once the team is pinned, enable the email notification for the pinned team. Refer the article https://www.mangoapps.com/help/apps013-how-can-i-set-up-email-notifications-in-mangoapps