By default, certain email notifications are turned on for your account, such as when an account you follow goes live or occassional updates from Livestream. You can adjust the type of emails you receive from Livestream
To edit the type of notifications you get, log in and navigate to your profile image in the upper right corner. Click Settings.
Click on the Notifications tab on the left and choose which kind of notifications you would like to receive. When you are done, click Save.