From the email setup application on your smartphone

In the email setup application, on the Email Accounts screen, highlight an email address.
Press the key > Edit > Delivery Options.
In the Auto BCC field, type an email address.
Press the key > Save.
If necessary, type the password for your email address.
If necessary, click OK until the Email Accounts screen appears.

To stop forwarding a copy of email messages that you send, clear the Auto BCC field.