You can view the delivery status of a campaign by going to Overview in the Email Marketing Module. From the Snapshot tab, select the campaign from the drop down box. This will show you the number of emails opened, unopened, bounced & unsubscribed.

For a more detailed report of the recipients that fall into these categories (opened, unopened, bounced & unsubscribed), you can go to the Email Delivery tab. There you will be able to click on a piece of the pie chart and the grid on the right will display the recipients in that category.