To ensure that the .CSV file you upload is successful, we recommend the following best practices when it comes to formatting the file:

1. Have the Email column be the first column, in Column A.
2. Include column headings for all columns that will be including in your email body as Merge Fields. These column headings will need to match your Merge Fields exactly; the column "FirstName" will not work with the Merge Field {!First}.
3. Don't include any blank email lines. The upload will stop once it encounters a line without an email address.
4. Only include information in the spreadsheet that you want to use in the email. If you are not using a column or row, remove it before uploading the .csv file. You should remove any additional tabs as well.
5. All files uploaded must be .csv files. The default file type is usually .xlsx - if this is the case, make sure you choose the file type named "Comma Separated Values (.csv)."

Example: