You may have a list of potential survey respondents in a spreadsheet (.csv). It is possible to upload a spreadsheet of contacts (aka build a "panel") in Qualtrics.
Visit Qualtrics Support; Importing a Contact List from a File to learn how to upload this contact information into Qualtrics.
Note: If you plan on emailing more than 200 contacts then you will have to create a directory list. Visit - Qualtrics Support: Creating and managing directories