php codeigniter ส่งเมลแล้วในส่วนของข้อความมันไม่ขึ้นบรรทัดใหม่ให้

$this->load->library('email');
$this->email->from($e_mail,$f_name);
$this->email->to($_POST['txtTo']); 
$this->email->cc($_POST['txtCc']); 
$this->email->bcc($_POST['txtBcc']); 
$this->email->subject($_POST['txtSubject']);
		
$msg = $_POST['txtDetail'];
		
$this->email->message($msg); 
$this->email->send();