Csharp: jmail組件發送郵件

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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();