If you'd like to upload a list of email addresses associated with a secure widget (only members with those email addresses will be able to use that widget), you can upload a CSV file. Only email addresses should be listed in the first column of your document.
From the Create Widget page, choose Secure Widget for your Widget Type. To upload the CSV file, simply press the orange button that says "Upload a CSV Instead" that you'll see below the text box:
Once your CSV has uploaded you'll be able to customize the widget and copy/paste it into your own email to share with your contacts. More info about creating the secure widget is here.
Important: Before you contact any NetGalley member, please also consult the information in our Best Practices for Using Member Email Addresses article.