Mistral Version 7
Log in to your personal Mailinblack area and go to Access my admin area at the top right of your screen by clicking on your Surname and First name.
From your admin area, click the Users menu.
Select Import CSV file by clicking on the following icon at the top of the page:
Follow the steps and download your CSV file.
Modify it. and click on Attach CSV file to import your new users.