Csharp: jmail組件發送郵件

jmail.Message MailObj = new jmail.MessageClass();           MailObj.From = "[e-mail]";  //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 = "[e-mail]";            MailObj.Logging = true;           MailObj.MailServerUserName = "[e-mail]";   //发件人地址           MailObj.ReplyTo = "[e-mail]"; //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("[e-mail]", "Geovin Du", "A");  //添加接收人           MailObj.AddRecipientBCC("[e-mail]", "b");  //密抄           MailObj.AddRecipientCC("[e-mail]", "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();