sender name when creating auto response

I am trying to leave the Sender Name Blank so when an email goes out it just has the email account that i am sending from but for some reason it keeps putting JotForm in the Sender Name area. How do i make it so it remains blank ¸

this is how it shows when i submit a form and don`t want people submitting to see the JotFom

Unfortunately, it is required to select one of the fields from the form to be as Sender Name. It is recommended not to leave it blank to avoid email bouncing related issues. Hence, if the field is not selected, it defaults with the text JotForm. 

Please refer to the guide below that can help you with more information on setting email alerts avoiding bounce related issues.

http://www.jotform.com/help/208-How-to-setup-email-alerts-to-prevent-email-bouncing-related-issues 

Hope this information helps!