Changing the sender e-mail

What steps do I need to take to have the submissions go back to JotForm and not my mailbox?

The submissions are always being sent to our server then to the recipient associated on the email notifications. The sender email on your notification is blank. You can use noreply@jotform.com as the sender e-mail.

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