[otrs] How to enter email address that is not in Customer Database

I set up otrs to look up customer information in a database. I also changed the form so that when an agent tabs out of the customer field, a search is automatically performed rather than having to click on "Search Customer". Now, when I enter an email address that is not found in the database, the search clears the field and does not allow me to use that address. Is there a way that I can still enter an email address that is not found in a customer database? Thanks, Tyler Hepworth