My client emails invoices and automatic reminders to his customers.  Every time QBO sends the invoices, it emails a copy to billing @ myclient.com.    How do I turn this off?

When I look in Accounts and Settings, Sales, Messages, the "Email me a copy at Billing @ Myclient.com" box is NOT checked and the Copy CC and the Blind Copy email boxes are both blank.

These unwanted copies are clogging up my client's billing email account and interfering with his business.  

Thanks for your help!