You can manage and customize your IECA web site subscriptions using the "Subscriptions" tab in your profile page. You can also subscribe to and unsubscribe from different types of content and/or individual pieces of content right on those pages. But it is in the user profile page where you see all of your subscriptions and related settings. By the way, these have nothing to do with your journal subscription.
For the EC List and Newsletter, you are automatically subscribed as a member, unless you choose to unsubscribe from those mailings.