silvestervella on "send email to post author author"

Currently I have this code

$user = get_userdata($voucher_buyer_id);
		$to = $user->user_email;
		$from_mail = couponxl_get_option( 'email_sender' );
	    $from_name = couponxl_get_option( 'name_sender' );
		$headers[] = "From: ".$from_name." <".$from_mail.">";

which auto-sends an email to the current logged user with purchase details.
how can I BCC the same email to the post author?

Thanks a lot