BCC for all outgoing e-mails

I was looking for a way to get a BCC of every outgoing mail by frontaccounting which is most of the times the sales invoice.

As a workaround I have set the bcc in the reporting/includes/class.mail.inc like this:

    function email($name, $mail)
    {

        $this->boundary = md5(uniqid(time()));
        $this->header .= "From: $name <$mail>\n";
        $this->bcc[] = 'info@mydomain.tld';
    }

Either I've overlooked this function within FA setup or it would be a nice improvement (for me at least).