Please follow these steps to download a spreadsheet that can be saved and filtered.
From [Dashboard], go to [Customers] [My Customers].
2. Click on [My Customers Exports] tab.
3. Click on the green '+' button, and then refresh your window after 5 seconds. A link will be created. Click on the link, and save the file in your computer. The export file should contain all your customers details (active and non-active) with a column that shows the invoicing email address.