STEP 1: In your Camapaigntrack account click on the gear icon at the top right. Then click Email Subscriptions.
STEP 2: From there, you'll be able to see the email subscription list and deactivate (or activate) any option you want.
Warning: If you untick the below option, you will no longer receive any email notifications from Campaigntrack.
Note: You also have the option in each email notification you receive to unsubscribe from there. But it will remove you from all notifications. It's best to use the above approach to select/deselect wanted & unwanted email notifications.