c#發送需要smtp認證的郵件

-------------------------調用類 -----------------------------------
private void SendMaill(string username,string superpassword,string email) {
 string body="尊敬的用戶： 您好！  & nbsp;你的登錄用戶名是："+username+"這是你的超級密碼:"+superpassword
 +"爲了您的賬號安全，我們建議您在收到郵件的72小時之內，到官方網站進行修改，並把該郵件刪除。"
 +" "
 +"　如有任何疑問，歡迎致電×××××發展有限責任公司客服熱線：028-×××××××，我們將熱情爲您解答。"
 +"　感謝您的支持！ "
 +"       & nbsp;               & nbsp;               & nbsp;    ××××××發展有限責任公司 "
 +"     & nbsp;               & nbsp;               & nbsp;      "+System.DateTime.Now.Year +"年"+System.DateTime.Now.Month+"月"+System.DateTime.Now.Day+"日 "
 +"             & nbsp;               & nbsp;               官網：http://www.×××××.com "
 +"       & nbsp;               & nbsp;               & nbsp;    ××××：http://www.××××.com";

 lion_office.Data.Library.MailClass.ESmtpMail sm=new lion_office.Data.Library.MailClass.ESmtpMail();
 sm.Send("mail.××××.com",
 "×××@××××.com",
 "××客服",
 email,
 username,
 true,
 "×××官方網站密碼找回郵件",
 body
 );

   Session.Remove("dd");
   Response.Redirect("FindSPassOK.aspx");
    }

-------------------------基類---------------------

using System;
using System.Text;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Collections;

namespace lion_office.Data.Library.MailClass
{
/*
Create By lion
2002-11-20 01:44
Copyright (C) 2001,2002 www.LionSky.Net. All rights reserved.
Web: http://www.Lionsky.net ;;
Email: [email protected]
Support .Net Framework Beta 2
*/
 public class ESmtpMail
 {
 private string enter="/r/n";
 /// <summary>
 /// 設定語言代碼，默認設定爲GB2312，如不需要可設置爲""
 /// </summary>
 public string Charset="GB2312";
 /// <summary>
 /// 發件人地址
 /// </summary>
 public string From="";
 /// <summary>
 /// 發件人姓名
 /// </summary>
 public string FromName="";
 /// <summary>
 /// 回覆郵件地址
 /// </summary>
 //public string ReplyTo="";
 /// <summary>
 /// 收件人姓名
 /// </summary>
 public string RecipientName="";
 /// <summary>
 /// 收件人列表
 /// </summary>
 private Hashtable Recipient=new Hashtable();
 /// <summary>
 /// 郵件服務器域名
 /// </summary>
 private string mailserver="";
 /// <summary>
 /// 郵件服務器端口號
 /// </summary>
 private int mailserverport=25;
 /// <summary>
 /// SMTP認證時使用的用戶名
 /// </summary>
 private string username="";
 /// <summary>
 /// SMTP認證時使用的密碼
 /// </summary>
 private string password="";
 /// <summary>
 /// 是否需要SMTP驗證
 /// </summary>
 private bool ESmtp=false;
 /// <summary>
 /// 是否Html郵件
 /// </summary>
 public bool Html=false;
 /// <summary>
 /// 郵件附件列表
 /// </summary>
 private System.Collections.ArrayList Attachments;
 /// <summary>
 /// 郵件發送優先級，可設置爲"High","Normal","Low"或"1","3","5"
 /// </summary>
 private string priority="Normal";
 /// <summary>
 /// 郵件主題
 /// </summary>
 public string Subject="";
 /// <summary>
 /// 郵件正文
 /// </summary>
 public string Body="";
 /// <summary>
 /// 收件人數量
 /// </summary>
 private int RecipientNum=0;
 /// <summary>
 /// 最多收件人數量
 /// </summary>
 private int recipientmaxnum=1;
 /// <summary>
 /// 密件收件人數量
 /// </summary>
 //private int RecipientBCCNum=0;
 /// <summary>
 /// 錯誤消息反饋
 /// </summary>
 private string errmsg;
 /// <summary>
 /// TcpClient對象，用於連接服務器
 /// </summary>
 private TcpClient tc;
 /// <summary>
 /// NetworkStream對象
 /// </summary>
 private NetworkStream ns;
 /// <summary>
 /// SMTP錯誤代碼哈希表
 /// </summary>
 private Hashtable ErrCodeHT = new Hashtable();
 /// <summary>
 /// SMTP正確代碼哈希表
 /// </summary>
 private Hashtable RightCodeHT = new Hashtable();
 public ESmtpMail()
 {
 Attachments = new System.Collections.ArrayList();
 }
 /// <summary>
 /// 郵件服務器域名和驗證信息
 /// 形如："user:paswww.server.com:25"，也可省略次要信息。如"user:paswww.server.com"www.server.com"
 /// </summary>
 public string MailDomain
 {
 set
 {
 string maidomain=value.Trim();
 int tempint;

            if(maidomain!="")
            {
               tempint=maidomain.IndexOf("@");
               if(tempint!=-1)
               {
                  string str=maidomain.Substring(0,tempint);
                  MailServerUserName=str.Substring(0,str.IndexOf(":"));
                  MailServerPassWord=str.Substring(str.IndexOf(":")+1,str.Length-str.IndexOf(":")-1);
                  maidomain=maidomain.Substring(tempint+1,maidomain.Length-tempint-1);
               }

               tempint=maidomain.IndexOf(":");
               if(tempint!=-1)
               {
                  mailserver=maidomain.Substring(0,tempint);
                  mailserverport=System.Convert.ToInt32(maidomain.Substring(tempint+1,maidomain.Length-tempint-1));
               }
               else
               {
                  mailserver=maidomain;

}

}
}

/// <summary>
 /// 郵件服務器端口號
 /// </summary>
 public int MailDomainPort
 {
 set
 {
 mailserverport=value;
 }
 }

/// <summary>
 /// SMTP認證時使用的用戶名
 /// </summary>
 public string MailServerUserName
 {
 set
 {
 if(value.Trim()!="")
 {
 username=value.Trim();
 ESmtp=true;
 }
 else
 {
 username="";
 ESmtp=false;
 }
 }
 }

/// <summary>
 /// SMTP認證時使用的密碼
 /// </summary>
 public string MailServerPassWord
 {
 set
 {
 password=value;
 }
 }

/// <summary>
 /// 郵件發送優先級，可設置爲"High","Normal","Low"或"1","3","5"
 /// </summary>
 public string Priority
 {
 set
 {
 switch(value.ToLower())
 {
 case "high":
 priority="High";
 break;

               case "1":
                  priority="High";
                  break;

               case "normal":
                  priority="Normal";
                  break;

               case "3":
                  priority="Normal";
                  break;

               case "low":
                  priority="Low";
                  break;

               case "5":
                  priority="Low";
                  break;

               default:
                  priority="Normal";
                  break;
            }
         }
      }

/// <summary>
 /// 錯誤消息反饋
 /// </summary>
 public string ErrorMessage
 {
 get
 {
 return errmsg;
 }
 }

/// <summary>
 /// 服務器交互記錄
 /// </summary>
 private string logs="";

/// <summary>
 /// 服務器交互記錄，如發現本組件不能使用的SMTP服務器，請將出錯時的Logs發給我（[email protected]），我將盡快查明原因。
 /// </summary>
 public string Logs
 {
 get
 {
 return logs;
 }
 }

/// <summary>
 /// SMTP迴應代碼哈希表
 /// </summary>
 private void SMTPCodeAdd()
 {
 ErrCodeHT.Add("500","郵箱地址錯誤");
 ErrCodeHT.Add("501","參數格式錯誤");
 ErrCodeHT.Add("502","命令不可實現");
 ErrCodeHT.Add("503","服務器需要SMTP驗證");
 ErrCodeHT.Add("504","命令參數不可實現");
 ErrCodeHT.Add("421","服務未就緒，關閉傳輸信道");
 ErrCodeHT.Add("450","要求的郵件操作未完成，郵箱不可用（例如，郵箱忙）");
 ErrCodeHT.Add("550","要求的郵件操作未完成，郵箱不可用（例如，郵箱未找到，或不可訪問）");
 ErrCodeHT.Add("451","放棄要求的操作；處理過程中出錯");
 ErrCodeHT.Add("551","用戶非本地，請嘗試<forward-path>");
 ErrCodeHT.Add("452","系統存儲不足，要求的操作未執行");
 ErrCodeHT.Add("552","過量的存儲分配，要求的操作未執行");
 ErrCodeHT.Add("553","郵箱名不可用，要求的操作未執行（例如郵箱格式錯誤）");
 ErrCodeHT.Add("432","需要一個密碼轉換");
 ErrCodeHT.Add("534","認證機制過於簡單");
 ErrCodeHT.Add("538","當前請求的認證機制需要加密");
 ErrCodeHT.Add("454","臨時認證失敗");
 ErrCodeHT.Add("530","需要認證");

RightCodeHT.Add("220","服務就緒");
 RightCodeHT.Add("250","要求的郵件操作完成");
 RightCodeHT.Add("251","用戶非本地，將轉發向<forward-path>");
 RightCodeHT.Add("354","開始郵件輸入，以<enter>.<enter>結束");
 RightCodeHT.Add("221","服務關閉傳輸信道");
 RightCodeHT.Add("334","服務器響應驗證Base64字符串");
 RightCodeHT.Add("235","驗證成功");
 }

/// <summary>
 /// 將字符串編碼爲Base64字符串
 /// </summary>
 /// <param name="estr">要編碼的字符串</param>
 private string Base64Encode(string str)
 {
 byte[] barray;
 barray=Encoding.Default.GetBytes(str);
 return Convert.ToBase64String(barray);
 }

/// <summary>
 /// 將Base64字符串解碼爲普通字符串
 /// </summary>
 /// <param name="dstr">要解碼的字符串</param>
 private string Base64Decode(string str)
 {
 byte[] barray;
 barray=Convert.FromBase64String(str);
 return Encoding.Default.GetString(barray);
 }

/// <summary>
 /// 得到上傳附件的文件流
 /// </summary>
 /// <param name="FilePath">附件的絕對路徑</param>
 private string GetStream(string FilePath)
 {
 //建立文件流對象
 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>
 /// 添加郵件附件
 /// </summary>
 /// <param name="path">附件絕對路徑</param>
 public void AddAttachment(string path)
 {
 Attachments.Add(path);
 }

/// <summary>
 /// 添加一個收件人
 /// </summary>
 /// <param name="str">收件人地址</param>
 public bool AddRecipient(string str)
 {
 str=str.Trim();
 if(str==null||str==""||str.IndexOf("@")==-1)
 return true;
 if(RecipientNum<recipientmaxnum)
 {
 Recipient.Add(RecipientNum,str);
 RecipientNum++;
 return true;
 }
 else
 {
 errmsg+="收件人過多";
 return false;
 }
 }

/// <summary>
 /// 最多收件人數量
 /// </summary>
 public int RecipientMaxNum
 {
 set
 {
 recipientmaxnum = value;
 }
 }

/// <summary>
 /// 添加一組收件人（不超過recipientmaxnum個），參數爲字符串數組
 /// </summary>
 /// <param name="str">保存有收件人地址的字符串數組（不超過recipientmaxnum個）</param>
 public bool AddRecipient(string[] str)
 {
 for(int i=0;i<str.Length;i++)
 {
 if(!AddRecipient(str[i]))
 {
 return false;
 }
 }
 return true;
 }

/// <summary>
 /// 發送SMTP命令
 /// </summary>
 private bool SendCommand(string str)
 {
 byte[] WriteBuffer;
 if(str==null||str.Trim()=="")
 {
 return true;
 }
 logs+=str;
 WriteBuffer = Encoding.Default.GetBytes(str);
 try
 {
 ns.Write(WriteBuffer,0,WriteBuffer.Length);
 }
 catch
 {
 errmsg="網絡連接錯誤";
 return false;
 }
 return true;
 }

/// <summary>
 /// 接收SMTP服務器迴應
 /// </summary>
 private string RecvResponse()
 {
 int StreamSize;
 string Returnvalue = "";
 byte[] ReadBuffer = new byte[1024] ;
 try
 {
 StreamSize=ns.Read(ReadBuffer,0,ReadBuffer.Length);
 }
 catch
 {
 errmsg="網絡連接錯誤";
 return "false";
 }

         if (StreamSize==0)
         {
            return Returnvalue ;
         }
         else
         {
            Returnvalue = Encoding.Default.GetString(ReadBuffer).Substring(0,StreamSize);
            logs+=Returnvalue;
            return Returnvalue;
         }
      }

/// <summary>
 /// 與服務器交互，發送一條命令並接收回應。
 /// </summary>
 /// <param name="Command">一個要發送的命令</param>
 /// <param name="errstr">如果錯誤，要反饋的信息</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>
 /// 與服務器交互，發送一組命令並接收回應。
 /// </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;
}

      private bool SendEmail()
      {
         //連接網絡
         try
         {
            tc=new TcpClient(mailserver,mailserverport);
         }
         catch(Exception e)
         {
            errmsg=e.ToString();
            return false;
         }

ns = tc.GetStream();
SMTPCodeAdd();

         //驗證網絡連接是否正確
         if(RightCodeHT[RecvResponse().Substring(0,3)]==null)
         {
            errmsg="網絡連接失敗";
            return false;
         }

string[] SendBuffer;
string SendBufferstr;

         //進行SMTP驗證
         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服務器驗證失敗，請覈對用戶名和密碼。"))
               return false;
         }
         else
         {
            SendBufferstr="HELO " + mailserver + enter;
            if(!Dialog(SendBufferstr,""))
               return false;
         }

//
 SendBufferstr="MAIL FROM:<" + From + ">" + enter;
 if(!Dialog(SendBufferstr,"發件人地址錯誤，或不能爲空"))
 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,"收件人地址有誤"))
            return false;

         SendBufferstr="DATA" + enter;
         if(!Dialog(SendBufferstr,""))
            return false;

SendBufferstr="From:" + FromName + "<" + From +">" +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;

         if(Charset=="")
         {
            SendBufferstr+="Subject:" + Subject + enter;
         }
         else
         {
            SendBufferstr+="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: Huolx.Pubclass" + enter;
         SendBufferstr+="MIME-Version: 1.0" + enter;

         SendBufferstr += "Content-Type: multipart/mixed;"+enter;//內容格式和分隔符
         SendBufferstr += "   boundary=/"----=_NextPart_000_00D6_01C29593.AAB31770/""+enter;
         SendBufferstr += "------=_NextPart_000_00D6_01C29593.AAB31770"+enter;

         if(Html)
         {
            SendBufferstr+="Content-Type: text/html;" + enter;
         }
         else
         {
            SendBufferstr+="Content-Type: text/plain;" + enter;
         }

         if(Charset=="")
         {
            SendBufferstr+="   charset=/"iso-8859-1/"" + enter;
         }
         else
         {
            SendBufferstr+="   charset=/"" + Charset.ToLower() + "/"" + enter;
         }
         //SendBufferstr += "Content-Transfer-Encoding: base64"+enter;

SendBufferstr+="Content-Transfer-Encoding: base64" + enter + enter;

         SendBufferstr+= Base64Encode(Body) + enter;
         if(Attachments.Count!=0)
         {
            foreach(string filepath in Attachments)
            {

               SendBufferstr += "------=_NextPart_000_00D6_01C29593.AAB31770"+enter;
               SendBufferstr += "Content-Type: application/octet-stream"+enter;
               SendBufferstr += "   name=/"=?"+Charset.ToUpper()+"?B?"+Base64Encode(filepath.Substring(filepath.LastIndexOf("//")+1))+"?=/""+enter;
               SendBufferstr += "Content-Transfer-Encoding: base64"+enter;
               SendBufferstr += "Content-Disposition: attachment;"+enter;
               SendBufferstr += "   filename=/"=?"+Charset.ToUpper()+"?B?"+Base64Encode(filepath.Substring(filepath.LastIndexOf("//")+1))+"?=/""+enter+enter;
               SendBufferstr += GetStream(filepath)+enter+enter;
            }
         }
         SendBufferstr += "------=_NextPart_000_00D6_01C29593.AAB31770--"+enter+enter;


         SendBufferstr += enter + "." + enter;

if(!Dialog(SendBufferstr,"錯誤信件信息"))
return false;

         SendBufferstr="QUIT" + enter;
         if(!Dialog(SendBufferstr,"斷開連接時錯誤"))
            return false;

         ns.Close();
         tc.Close();
         return true;
      }

/// <summary>
 /// 發送郵件方法，所有參數均通過屬性設置。
 /// </summary>
 public bool Send()
 {
 if(Recipient.Count==0)
 {
 errmsg="收件人列表不能爲空";
 return false;
 }

         if(mailserver.Trim()=="")
         {
            errmsg="必須指定SMTP服務器";
            return false;
         }

         return SendEmail();

      }

/// <summary>
 /// 發送郵件方法
 /// </summary>
 /// <param name="smtpserver">smtp服務器信息，如"username:passwordwww.smtpserver.com:25"，也可去掉部分次要信息，如www.smtpserver.com"</param>
 /// <param name="from">發件人mail地址</param>
 /// <param name="fromname">發件人姓名</param>
 /// <param name="to">收件人地址</param>
 /// <param name="toname">收件人姓名</param>
 /// <param name="html">是否HTML郵件</param>
 /// <param name="subject">郵件主題</param>
 /// <param name="body">郵件正文</param>
 public bool Send(string smtpserver,string from,string fromname,string to,string toname,bool html,string subject,string body)
 {
 MailDomain=smtpserver;
 From=from;
 FromName=fromname;
 AddRecipient(to);
 RecipientName=toname;
 Html=html;
 Subject=subject;
 Body=body;
 return Send();
 }


 }
}

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