如何能高效的发送邮件？按10分钟10000封的量发送

Question

private bool AddRecipient(string Recipients)
  {
   if(RecipientNum<recipientmaxnum)
   {
    Recipient.Add(RecipientNum,Recipients);
    RecipientNum++;    
    return true;
   }
   else
   {
    Dispose();
    throw(new ArgumentOutOfRangeException("Recipients","收件人过多不可多于 "+ recipientmaxnum  +" 个"));
   }
  }  void Dispose()
  {
   if(ns!=null)ns.Close();
   if(tc!=null)tc.Close();
  }  /// <summary>
  /// SMTP回应代码哈希表
  /// </summary>
  private void SMTPCodeAdd()
  {
   ErrCodeHT.Add("500","邮箱地址错误");
   ErrCodeHT.Add("501","参数格式错误");
   ErrCodeHT.Add("502","命令不可实现");
   ErrCodeHT.Add("503","服务器需要SMTP验证");
   ErrCodeHT.Add("504","命令参数不可实现");
   ErrCodeHT.Add("421","服务未就绪，关闭传输信道");
   ErrCodeHT.Add("450","要求的邮件操作未完成，邮箱不可用（例如，邮箱忙）");
   ErrCodeHT.Add("550","要求的邮件操作未完成，邮箱不可用（例如，邮箱未找到，或不可访问）");
   ErrCodeHT.Add("451","放弃要求的操作；处理过程中出错");
   ErrCodeHT.Add("551","用户非本地，请尝试<forward-path>");
   ErrCodeHT.Add("452","系统存储不足，要求的操作未执行");
   ErrCodeHT.Add("552","过量的存储分配，要求的操作未执行");
   ErrCodeHT.Add("553","邮箱名不可用，要求的操作未执行（例如邮箱格式错误）");
   ErrCodeHT.Add("432","需要一个密码转换");
   ErrCodeHT.Add("534","认证机制过于简单");
   ErrCodeHT.Add("538","当前请求的认证机制需要加密");
   ErrCodeHT.Add("454","临时认证失败");
   ErrCodeHT.Add("530","需要认证");   RightCodeHT.Add("220","服务就绪");
   RightCodeHT.Add("250","要求的邮件操作完成");
   RightCodeHT.Add("251","用户非本地，将转发向<forward-path>");
   RightCodeHT.Add("354","开始邮件输入，以<enter>.<enter>结束");
   RightCodeHT.Add("221","服务关闭传输信道");
   RightCodeHT.Add("334","服务器响应验证Base64字符串");
   RightCodeHT.Add("235","验证成功");
  }
  /// <summary>
  /// 将字符串编码为Base64字符串
  /// </summary>
  /// <param name="str">要编码的字符串</param>
  private string Base64Encode(string str)
  {
   byte[] barray;
   barray=Encoding.Default.GetBytes(str);
   return Convert.ToBase64String(barray);
  }
  /// <summary>
  /// 将Base64字符串解码为普通字符串
  /// </summary>
  /// <param name="str">要解码的字符串</param>
  private string Base64Decode(string str)
  {
   byte[] barray;
   barray=Convert.FromBase64String(str);
   return Encoding.Default.GetString(barray);
  }  
  /// <summary>
  /// 得到上传附件的文件流
  /// </summary>
  /// <param name="FilePath">附件的绝对路径</param>
  private string GetStream(string FilePath)
  {
   //建立文件流对象
   System.IO.FileStream FileStr=new System.IO.FileStream(FilePath,System.IO.FileMode.Open);
   byte[] by=new byte[System.Convert.ToInt32(FileStr.Length)];
   FileStr.Read(by,0,by.Length);
   FileStr.Close();
   return(System.Convert.ToBase64String(by));
  }  /// <summary>
  /// 发送SMTP命令
  /// </summary> 
  private bool SendCommand(string str)
  {
   byte[]  WriteBuffer;
   if(str==null||str.Trim()==String.Empty)
   {
    return true;
   }
   logs+=str;
   WriteBuffer = Encoding.Default.GetBytes(str);
   try
   {
    ns.Write(WriteBuffer,0,WriteBuffer.Length);
   }
   catch
   {
    errmsg="网络连接错误";
    return false;
   }
   return true;
  }  /// <summary>
  /// 接收SMTP服务器回应
  /// </summary>
  private string RecvResponse()
  {
   int StreamSize;
   string ReturnValue = String.Empty;
   byte[]  ReadBuffer = new byte[1024] ;
   try
   {
    StreamSize=ns.Read(ReadBuffer,0,ReadBuffer.Length);
   }
   catch
   {
    errmsg="网络连接错误";
    return "false";
   }   if (StreamSize==0)
   {
    return ReturnValue ;
   }
   else
   {
    ReturnValue = Encoding.Default.GetString(ReadBuffer).Substring(0,StreamSize);
    logs+=ReturnValue+this.enter;
    return  ReturnValue;
   }
  }

Answer 1

/// <summary>
  /// 与服务器交互，发送一条命令并接收回应。
  /// </summary>
  /// <param name="str">一个要发送的命令</param>
  /// <param name="errstr">如果错误，要反馈的信息</param>
  private bool Dialog(string str,string errstr)
  {
   if(str==null||str.Trim()=="")
   {
    return true;
   }
   if(SendCommand(str))
   {
    string RR=RecvResponse();
    if(RR=="false")
    {
     return false;
    }
    string RRCode=RR.Substring(0,3);
    if(RightCodeHT[RRCode]!=null)
    {
     return true;
    }
    else
    {
     if(ErrCodeHT[RRCode]!=null)
     {
      errmsg+=(RRCode+ErrCodeHT[RRCode].ToString());
      errmsg+=enter;
     }
     else
     {
      errmsg+=RR;
     }
     errmsg+=errstr;
     return false;
    }
   }
   else
   {
    return false;
   }  }
  /// <summary>
  /// 与服务器交互，发送一组命令并接收回应。
  /// </summary>  private bool Dialog(string[] str,string errstr)
  {
   for(int i=0;i<str.Length;i++)
   {
    if(!Dialog(str[i],""))
    {
     errmsg+=enter;
     errmsg+=errstr;
     return false;
    }
   }   return true;
  }  /// <summary>
  /// SendEmail
  /// </summary>
  /// <returns></returns>
  private bool SendEmail()
  {
   //连接网络
   try
   {
    tc=new TcpClient(mailserver,mailserverport);
   }
   catch(Exception e)
   {
    errmsg=e.ToString();
    return false;
   }   ns = tc.GetStream();
   SMTPCodeAdd();   //验证网络连接是否正确
   if(RightCodeHT[RecvResponse().Substring(0,3)]==null)
   {
    errmsg="网络连接失败";
    return false;
   }
   string[] SendBuffer;
   string SendBufferstr;   //进行SMTP验证
   if(ESmtp)
   {
    SendBuffer=new String[4];
    SendBuffer[0]="EHLO " + mailserver + enter;
    SendBuffer[1]="AUTH LOGIN" + enter;
    SendBuffer[2]=Base64Encode(username) + enter;
    SendBuffer[3]=Base64Encode(password) + enter;
    if(!Dialog(SendBuffer,"SMTP服务器验证失败，请核对用户名和密码。"))
     return false;
   }
   else
   {
    SendBufferstr="HELO " + mailserver + enter;
    if(!Dialog(SendBufferstr,""))
     return false;
   }   //
   SendBufferstr="MAIL FROM:<" + From + ">" + enter;
   if(!Dialog(SendBufferstr,"发件人地址错误，或不能为空"))
    return false;   //
   SendBuffer=new string[recipientmaxnum];
   for(int i=0;i<Recipient.Count;i++)
   {
    SendBuffer[i]="RCPT TO:<" + Recipient[i].ToString() +">" + enter;   }
   if(!Dialog(SendBuffer,"收件人地址有误"))
    return false;   /*
      SendBuffer=new string[10];
      for(int i=0;i<RecipientBCC.Count;i++)
      {       SendBuffer[i]="RCPT TO:<" + RecipientBCC[i].ToString() +">" + enter;      }      if(!Dialog(SendBuffer,"密件收件人地址有误"))
       return false;
   */
   SendBufferstr="DATA" + enter;
   if(!Dialog(SendBufferstr,""))
    return false;   SendBufferstr="From:" + FromName + "<" + From +">" +enter;   //if(ReplyTo.Trim()!="")
   //{
   // SendBufferstr+="Reply-To: " + ReplyTo + enter;
   //}   //SendBufferstr+="To:" + RecipientName + "<" + Recipient[0] +">" +enter;
   SendBufferstr += "To:=?"+Charset.ToUpper()+"?B?"+Base64Encode(RecipientName)+"?="+"<"+Recipient[0]+">"+enter;
   
   SendBufferstr+="CC:";
   for(int i=0;i<Recipient.Count;i++)
   {
    SendBufferstr+=Recipient[i].ToString() + "<" + Recipient[i].ToString() +">,";
   }
   SendBufferstr+=enter;   SendBufferstr+=((Subject==String.Empty || Subject==null)?"Subject:":((Charset=="")?("Subject:" + Subject):("Subject:" + "=?" + Charset.ToUpper() + "?B?" + Base64Encode(Subject) +"?="))) + enter;
   SendBufferstr+="X-Priority:" + priority + enter;
   SendBufferstr+="X-MSMail-Priority:" + priority + enter;
   SendBufferstr+="Importance:" + priority + enter;
   SendBufferstr+="X-Mailer: Lion.Web.Mail.SmtpMail Pubclass [cn]" + enter;
   SendBufferstr+="MIME-Version: 1.0" + enter;
   if(Attachments.Count!=0)
   {
    SendBufferstr+="Content-Type: multipart/mixed;" + enter;
    SendBufferstr += " boundary=\"====="+(Html?"001_Dragon520636771063_":"001_Dragon303406132050_")+"=====\""+enter+enter;
   }   if(Html)
   {
    if(Attachments.Count==0)
    {
     SendBufferstr += "Content-Type: multipart/alternative;"+enter;//内容格式和分隔符
     SendBufferstr += " boundary=\"=====003_Dragon520636771063_=====\""+enter+enter;     SendBufferstr += "This is a multi-part message in MIME format."+enter+enter;
    }
    else
    {
     SendBufferstr +="This is a multi-part message in MIME format."+enter+enter;
     SendBufferstr += "--=====001_Dragon520636771063_====="+enter;
     SendBufferstr += "Content-Type: multipart/alternative;"+enter;//内容格式和分隔符
     SendBufferstr += " boundary=\"=====003_Dragon520636771063_=====\""+enter+enter;     
    }
    SendBufferstr += "--=====003_Dragon520636771063_====="+enter;
    SendBufferstr += "Content-Type: text/plain;"+ enter;
    SendBufferstr += ((Charset=="")?(" charset=\"iso-8859-1\""):(" charset=\"" + Charset.ToLower() + "\"")) + enter;
    SendBufferstr+="Content-Transfer-Encoding: base64" + enter + enter;
    SendBufferstr+= Base64Encode("邮件内容为HTML格式，请选择HTML方式查看") + enter + enter;    SendBufferstr += "--=====003_Dragon520636771063_====="+enter;        SendBufferstr+="Content-Type: text/html;" + enter;
    SendBufferstr+=((Charset=="")?(" charset=\"iso-8859-1\""):(" charset=\"" + Charset.ToLower() + "\"")) + enter;
    SendBufferstr+="Content-Transfer-Encoding: base64" + enter + enter;
    SendBufferstr+= Base64Encode(Body) + enter + enter;
    SendBufferstr += "--=====003_Dragon520636771063_=====--"+enter;
   }
   else
   {
    if(Attachments.Count!=0)
    {
     SendBufferstr += "--=====001_Dragon303406132050_====="+enter;
    }
    SendBufferstr+="Content-Type: text/plain;" + enter;
    SendBufferstr+=((Charset=="")?(" charset=\"iso-8859-1\""):(" charset=\"" + Charset.ToLower() + "\"")) + enter;
    SendBufferstr+="Content-Transfer-Encoding: base64" + enter + enter;
    SendBufferstr+= Base64Encode(Body) + enter;
   }
   
   //SendBufferstr += "Content-Transfer-Encoding: base64"+enter;      
   if(Attachments.Count!=0)
   {
    for(int i=0;i<Attachments.Count;i++)
    {
     string filepath = (string)Attachments[i];
     SendBufferstr += "--====="+ (Html?"001_Dragon520636771063_":"001_Dragon303406132050_") +"====="+enter;
     //SendBufferstr += "Content-Type: application/octet-stream"+enter;
     SendBufferstr += "Content-Type: text/plain;"+enter;
     SendBufferstr += " name=\"=?"+Charset.ToUpper()+"?B?"+Base64Encode(filepath.Substring(filepath.LastIndexOf("file://")+1))+"?=/""+enter;
     SendBufferstr += "Content-Transfer-Encoding: base64"+enter;
     SendBufferstr += "Content-Disposition: attachment;"+enter;
     SendBufferstr += " filename=\"=?"+Charset.ToUpper()+"?B?"+Base64Encode(filepath.Substring(filepath.LastIndexOf("file://")+1))+"?=/""+enter+enter;
     SendBufferstr += GetStream(filepath)+enter+enter;
    }
    SendBufferstr += "--====="+ (Html?"001_Dragon520636771063_":"001_Dragon303406132050_") +"=====--"+enter+enter;
   }
   
   
   
   SendBufferstr += enter + "." + enter;   if(!Dialog(SendBufferstr,"错误信件信息"))
    return false;
   SendBufferstr="QUIT" + enter;
   if(!Dialog(SendBufferstr,"断开连接时错误"))
    return false;
   ns.Close();
   tc.Close();
   return true;
  }
  #endregion

Answer 2

#region
  /*
  /// <summary>
  /// 添加一个密件收件人
  /// </summary>
  /// <param name="str">收件人地址</param>
  public bool AddRecipientBCC(string str)
  {
   if(str==null||str.Trim()=="")
    return true;
   if(RecipientBCCNum<10)
   {
    RecipientBCC.Add(RecipientBCCNum,str);
    RecipientBCCNum++;
    return true;
   }
   else
   {
    errmsg+="收件人过多";
    return false;
   }
  }
  /// <summary>
  /// 添加一组密件收件人（不超过10个），参数为字符串数组
  /// </summary> 
  /// <param name="str">保存有收件人地址的字符串数组（不超过10个）</param>
  public bool AddRecipientBCC(string[] str)
  {
   for(int i=0;i<str.Length;i++)
   {
    if(!AddRecipientBCC(str[i]))
    {
     return false;
    }
   }
   return true;
  }  */   
  #endregion 
 } #endregion
}

Answer 3

to  shenghuayi(oldman)和 Herong(Herong)    当然不是要发垃圾邮件了，各位有点常识好么！现在服务器都有自动过滤垃圾邮件功能，你1分钟发10封就封你ip，你根本不可能发的出去！我是要给公司内部自己搭建的邮件服务器做压力测试！！
请各位帮忙！谢谢

Answer 4

Lion.Web.Mail.SmtpMail的不错呀，用过

Answer 5

to:goody9807() 
谢谢给出的代码！我拿出测试一下请问有没有调用的例子？

Answer 6

System.Web.Mail.MailMessage
MailMessage.To 
可以把所有的收件人的地址用";"隔开

Answer 7

http://blog.csdn.net/goody9807/articles/30560.aspx
这个是jmail发邮件的例子  你先看看 
不知道能否对你有帮助

Answer 8

谢谢 goody9807() 
我看了，不过哪个好像是从pop3读信件的

Answer 9

發信呀？
System.Web.Mail.MailMessage不錯呀！
你這個條件應該是可以達到的，如果是自己的Smtp服務器的話，更多些也行