Go by the main menu “Contacts” and click on “Broadcast lists”.
Click on “Create a new list” button.
Give a name to your list and save.
Then you can edit it:
Click on "Contacts" and then on the arrow in the "Actions" button.
Download the CSV model and modify it with your own data. Be careful and always respect the arrangement and the name of the columns. You are not obliged to complete all the field.
Let's take an example of a completed document :
Once your file is ready, get back to the "Actions" button and click on "Import from your CSV file". A message tell you if everything is ok or if you have some issues to modify.
Finally, click on "Confirm import" to go to your broadcast list.
Your final list looks like the following picture. You can still manually edit each contact, by clicking on "Edit".