http://www.codeproject.com/csharp/pop3client.asp原文件在这拉。我修改成如下这样也没用。
private void issue_command(string command)
{
//send the command to the pop server.  This code snipped "borrowed"
//with some modifications...
//from the article "Retrieve Mail From a POP3 Server Using C#" at
//www.codeproject.com by Agus Kurniawan
//http://www.codeproject.com/csharp/popapp.asp
Data= command + CRLF;
szData = System.Text.Encoding.GetEncoding("GB2312").GetBytes(Data.ToCharArray());
NetStrm.Write(szData,0,szData.Length); }