C#+jmail组建接收邮件出现问题，请高手帮忙

Question

应该是pop3.163.com,我那时做的时候，好像163邮箱对哪个时间段前注册的邮箱是不支持POP3的，你要看一下，大致代码如下，具体实现下载http://download.csdn.net/source/2187303
public void ReceiveMails()
        {            jmail.Message Msg = new jmail.Message();
            jmail.POP3 jpop = new jmail.POP3();
            jmail.Attachments atts;
            jmail.Attachment att;            strMailUsername = txtUserName.Text.Trim();
            strMailpassword = txtPassword.Text.Trim();
            strPOP3Address = txtServerName.Text.Trim();
            MailPopPort = Convert.ToInt32(txtMailPort.Text.Trim());
            Msg.ISOEncodeHeaders = true;            jpop.Connect(strMailUsername, strMailpassword, strPOP3Address, MailPopPort);
            //如果服务器上有邮件
            if (jpop.Count >= 1)
            {
                for (int i = 1; i <= jpop.Count; i++)
                {                    Msg.Charset = "gb2312";
                    Msg.ContentTransferEncoding = "base64";
                    Msg.Encoding = "base64";
                    Msg.ISOEncodeHeaders = false;                      Msg = jpop.Messages[i];
                    atts = Msg.Attachments;
                    richTextBox1.Text += Msg.FromName + " " + Msg.Subject + " " + Msg.Body + " " + Msg.Date.ToLongDateString();                    //获取附件上传到服务器并且将信息存入数据库
                    if (atts.Count >= 1)
                    {
                        for (int k = 0; k < atts.Count; k++)
                        {                            att = atts[k];//获得附件
                            att.SaveToFile(@"c:\" + att.Name);                    
                        }
                    }
                }
            }
        }