Csharp: jmail組件發送郵件

jmail.Message MailObj = new jmail.MessageClass();
           MailObj.From = "geovindu@qq.com";  //发件人的地址 可以显示与服务名不一样
           MailObj.FromName = "締友計算機信息技術有限公司";//用户名
           //MailObj.FromName = "geovindu@dupcit.com"; 
           MailObj.Logging = true;
           MailObj.MailServerUserName = "geovindu@qq.com";   //发件人地址
           MailObj.ReplyTo = "geovindu@163.com"; //回复邮件名称
           MailObj.MailServerPassWord = "123456789"; //服务器验证
           //MailObj.Text = "text/html";
           MailObj.HTMLBody = "涂斯博，涂聚文，<br/>涂聚文"+DateTime.Now.ToString();//內容
           MailObj.Charset = "gb2312";//編碼
           MailObj.Subject = "缔友计算机信息技术有限公司項目解決方案事宜";//標題           
           MailObj.AddRecipient("463588883@qq.com", "Geovin Du", "A");  //添加接收人
           MailObj.AddRecipientBCC("401620863@qq.com", "b");  //密抄
           MailObj.AddRecipientCC("413265257@qq.com", "涂年生", "c");//抄送
           MailObj.Priority = 1;//邮件的紧急程序，1 为最快，5 为最慢， 3 为默认值
           MailObj.AddAttachment(@"C:\\DSCF0066.jpg", false, "image/jpg");
           MailObj.AddAttachment(@"C:\\EmployeesInfo.xls", false, "application/excel");
           MailObj.AddAttachment(@"C:\\geovindu.doc", false, "application/msword");//大附件发送 23.77M
           Thread.Sleep(1000);
 
           try
           {
               bool bool_OK = MailObj.Send("mail.jw28.com", false);
               if (bool_OK == true)
               {
                   MessageBox.Show("邮件发送成功！");
                   //this.label3.Text = "邮件发送成功！"; //不可以在线程中用
               }
               if (bool_OK == false)
               {
                   MessageBox.Show("邮件发送失败！");
               }
           }
           catch (Exception ex)
           {
               MessageBox.Show(ex.Message);
           }
 
           MailObj.Close();