Once you have logged into the editor click 'Newsletters' from the menu on the left.
Once you have logged into the editor click 'Newsletters' from the menu on the left.
Then click 'Subscribers' which should have appeared under 'Newsletters'.
You will now see a table containing the details of all newsletter subscribers.
You should be able to see each subscriber's ID, email address and status. To delete a subscriber, click the corresponding 'Delete' button on the right.