Emails that have hard or soft "bounced" for particular contacts can be viewed by individual campaign.

You may also see record of a recently bounced email within a contacts profile under their General Statistics, or within their Timeline.

To view bounced emails by campaign, start by navigating to the Campaigns menu.
From here:

• Click the more icon next to a running or finished campaign, and then select View Report.

• Once you're within the campaign report, click on the Metrics tab (1).
• Scroll down and click on Bounces (2) to see details on all bounced emails for this campaign.
• You can also download this list using the Download link (3).

Note: You can also view Unsubscribes (4) per campaign the same way, or you can view all unsubscribes together.