Yes, this is what most customers do.
Please go to ADD RECIPIENT - ALL OPTIONS in the top left corner of your recipients list.
You will find the option "UPLOAD EXCEL FILE" in the drop down.
Please click this option.
A popup will appears showing you 2 example images - displaying 2 options how to prepare your excel file:
Independent of your file, when uploading, you can match each column of your file with the header needed in the upload window.