How to create an Unsubscribe/Bounce list
To determine which leads have unsubscribed or bounced to you emails and newsletters create a smart list and set the following conditions:
To determine leads who have unsubscribed choose 'Lead Property' Subscribed -> is -> False:
To determine the leads who have had a bounced email choose 'Email' -> Have -> Bounced:
Once created because smart lists are continual any future leads who unsubscribe or bounce will be added to the list.