Email notifications are only project-based. To configure them, go to Projects → select the desired project → click on Edit Notifications (bell icon on top).
Then toggle on/off individually which email notifications you would like to receive or dismiss.
NOTE: You will automatically receive an email notification once you've beeen assigned to a project - this option can't be turned off.
Initial Project Notifications
You can also configure pre-set email notifications that will apply to every newly created project. To access them, click on your profile (bottom left corner) → Company Settings → Projects → Initial Project Notifications.