How to track Bounces: Now that you have email integration your e-mail provider will send you an e-mail letting you know the specific e-mail address that bounced.
Without integration BuzzBuilder would only tell you the bounce rate but not give you the email addresses so you could do research to find a new e-mail for the prospect.

How to Track Bounces: 

1. Setup a folder in your inbox titled bounces and have those e-mails forwarded to that folder. 
2. Now you will have all of your bounced e-mail addresses together and you can track bounce statistics

Opt-out Bounced e-mail addresses in BuzzBuilder: Also, make sure and remove those bounced e-mail addresses in BuzzBuilder by going to the contact page, searching for the e-mail address and opting them out.