There isn't a way to set up CC's or BCC's in a mailing in Emma.
That being said, the way that we send does not send a list of email addresses that the mailing is sent to. Each email is sent individually, so effectively each send is similar to a BCC in that the email shows in the inbox to be from your sender address to the single address.
If you're wanting to make sure to send a copy of each mailing to a particular address, you'll just want to add it in to your audience and make sure it is in the groups that you normally send to. Otherwise, you can add in the address manually to each send.
Let me know if there is some other functionality that you're looking for in this.