CodeIgniter 发送邮件

$config['charset'] = 'utf-8';
$config['wordwrap'] = TRUE;

$config['protocol'] = 'smtp';
$config['smtp_host'] = "smtp.163.com";
$config['smtp_user'] = '用户名';
$config['smtp_pass'] = '客户端密码';
$config['smtp_port'] = '25';

$config['mailtype'] = 'html';

public function send(){
$this->load->library('email');

$this->email->from('发件人邮箱', '显示名称(可选)');
$this->email->to('收件人邮箱');
$this->email->cc('抄送人邮箱');
$this->email->bcc('密送人邮箱');

$this->email->subject('邮件主题');
$this->email->message('邮件正文，支持html');
$this->email->set_alt_message('如果使用html格式，对方不支持html时，显示的内容，如果不填写，会CI会自动将html标签去掉显示');

$result = $this->email->send();
if($result){
$data ['result'] = 'send success';
}else{
$data ['result'] = 'send failed';
}
$this->template->view ( 'email/email', $data );
}