First option: download the emails of a specific campaign
You can download the emails of a specific campaign directly from your dashboard by selecting the "Download CSV" option next to your campaign.
Second option: download the emails of more than one campaign or the emails collected during a specific period
Log in to your account and open the reporting page:
Select the campaigns you want to export
Select the relevant date range and select apply.
Important: if you want to download email addresses collected today, make sure to include today in the date range (it's excluded from the default date ranges)
Click "Download emails" below the graph.