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I am not sure if I have understood your question correctly. Do you want to change the email address on which you receive submission emails?
You should actually change the "Recipient email" address of your form's notification email alert. The following guide should help you : http://www.jotform.com/help/41-Finding-out-E-mail-Address-used-for-submission-notifications
Hope this helps.
Do get back to us if you meant to ask something else.