How do I see what email a subscriber received after the campaign has been sent?
If you go to your campaign overview, clicking on the number of recipients will redirect you to the subscribers that received the given campaign:
(please note that the email addresses seen in this picture are automatically generated, they are not real).
Clicking on the eye icon from the Options column will reveal the exact email the subscriber received. This will also track the open and any click on any link inside the page.