You may have noticed the View All Contacts button in your list section has one more address than your lists have. If you just logged into your account for the first time, you'll already see 1 address even though you have no lists.
This is because we're counting you! We add the address you used to create your account as your first contact and you can then add it to any lists you like. Click the View All Contacts button and check it out!
Once you've created a list you can add your address to it, click here for more help with setting up a list.