大家好，请问下, 我在.net中使用lumisoft框架，通过imap协议。能够实现将邮件内容保存到草稿箱中，但是重复多次保存，则会生成多条记录，而不是最原始的一条记录。源码如下：

                if (imap.IsConnected)
                {
                    using (var stream = new MemoryStream())
                    {
                        mailMessage.ToStream(stream, new MIME_Encoding_EncodedWord(MIME_EncodedWordEncoding.Q, Encoding.UTF8),
                                Encoding.UTF8);
                        stream.Position = 0;
                        imap.StoreMessage("INBOX.Drafts", new[] { IMAP_t_MsgFlags.Draft}, DateTime.Now, stream, (int)stream.Length);
     
             
                        stream.Close();
                        stream.Dispose(); //释放资源
                    }
                    //断开连接
                    imap.Disconnect();
                }