Inside your self service portal, you can easily manage your email preferences to ensure you are getting all the notifications you want/need in order to manage your bookings.
To view and modify your email preferences
Login to your customer portal.
From the homepage click your name on the top right of the screen.
Select Email preferences from the menu
Select or deselect the individual emails
Save changes at the bottom of the page.
That's it, once saved moving forward you will only receive notifications for what's enabled with a blue checkmark