Notifications are managed within the Member Center. At this time, the settings for all types of notifications are the same.
Once signed in to the Member Center, click your personal icon at the top right corner and choose Account. Select the tab labeled Settings. From this form, you may choose what channel you would like to enable to receive your notifications.
You may select all of them or none based on your preference. Then, you may choose the frequency to receive notifications as soon as they are posted, or only once per day.