1. Go to the Reports tab.
2. Click on the specific email campaign.
3. Click the Opens button.

You can export those contacts who opened your email. Here's how you do that:

1. Click on the Reports tab.
2. Click on Email Reports in the menu.
3. Click on the name of the email you want to use for the list of those who opened it.
4. Click on the OPENS button.
5. Click on Export to Excel or Export CSV.