Add to Cart Email Popup – Subscriber’s Email Address not being registered

I’ve tested the Email Popup on ‘Add to cart’ button but the email address is not being registered and hence abandoned cart emails too are not being sent. Where can I see those email addresses of users who have entered the email address in the ‘Add to cart’ popup? Also I wanted to know if this feature uses cookies to track the user as I was not re-directed to the Checkout page after I filled the popup form for the 2nd,3rd… times.