163邮件推送：

public function email(){
 $title= '';//标题
 $email= '';//收件箱
 $url= '';//附件地址
 $result = $this->sendMailGsfy($title,'',$email,$url,'发送邮件名');
 }

function sendMailGsfy($subject,$msg,$touser,$attach='',$username=''){
  $user = '';//账号
  $pass = '';//密码

   header("content-type:text/html;charset=utf8");
  $config['email_config']=[];
  $config['email_config']['protocol'] = 'smtp';
  $config['email_config']['smtp_host'] = '';//网域
  $config['email_config']['smtp_user'] =$user;
  $config['email_config']['smtp_pass'] =$pass;
  $config['email_config']['smtp_port'] = 465;
  $config['email_config']['smtp_crypto'] = 'ssl';
  $config['email_config']['charset'] = 'utf-8';
  $config['email_config']['wordwrap'] = TRUE;
  $config['email_config']['mailtype'] = 'html';
  $config['email_config']['crlf'] = "\r\n";
  $obj->load->library('email');//引入三方
  $obj->email->initialize($config['email_config']);
  $obj->email->set_newline("\r\n");
  $obj->email->from($user, $username);
  $obj->email->to($touser);
  $obj->email->subject($subject);
  $obj->email->message($msg);
  if($attach){
   $obj->email->attach($attach);
   }
   $res =  $obj->email->send();//成功返回1
   $obj->email->clear(true);
   return $res;
  }