The spreadsheet file must be either an .xls or .xlsx Excel file.

The Excel file must contain 1 column with a title of Email.

Each email address should be on a separate line in the Email column as shown in the image below:

Upload the spreadsheet files using the Upload link next to the selection menu on the broadcast form. Once the files are uploaded you can select them from the Spreadsheet List menu.

Spreadsheet lists allow up to 10,000 recipients per file. You can upload as many spreadsheet lists as needed.