Yes, you can upload a list with only email addresses or with multiple parameters like name, city, phone, etc too.
We simply require that all of your emails are in one column with header name as EMAIL. You are free to add as many other columns of data like FIRST_NAME, LAST_NAME, etc as you need.
The process of list cleaning doesn’t delete/alter the other set of data. The process only runs on the column with header name as EMAIL.
Here is a sample of how your CSV data should look like;