EMAIL发送系统(C#+基于SMTP认证)

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p>刚学.net时，试着做一个文章管理系统，第一次开始使用.net的System.Web.Mail消息组件，觉得很好用，而且简单。但后来发现.net自带的SmtpMail不支持SMTP认证，而且许多许多SMTP服务器不只需要登陆验证，还对MAIL From作了验证(比如263)，如果和登陆用的用户名不符也不能发信,所以决定自己用C#写一个SendMail程序，其中参考了Huolx的一部分思想，取了他的一些优点。

欢迎大家提出修改建议，[注：发布时请保留版权]最好能把修改稿Mail给我一份，我们共同学习
我的Email:lion-a@sohu.com lion.net@163.com

下载：点载下载
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演示：Lion互动网络的技术文章中，每一篇文章下面有邮件打包发送就是用这个组件

源码:


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: lion-a@sohu.com


Support .Net Framework Beta 2


*/


public class ESmtpMail




...{


private string enter=" ";




/**//// <summary>


/// 设定语言代码，默认设定为GB2312，如不需要可设置为""


/// </summary>


public string Charset="GB2312";




/**//// <summary>


/// 发件人地址


/// </summary>


public string From="";




/**//// <summary>


/// 发件人姓名


/// </summary>


public string FromName="";




/**//// <summary>


/// 回复邮件地址


/// </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>


/// 邮件服务器域名


/// </summary>


private string mailserver="";




/**//// <summary>


/// 邮件服务器端口号


/// </summary>


private int mailserverport=25;




/**//// <summary>


/// SMTP认证时使用的用户名


/// </summary>


private string username="";




/**//// <summary>


/// SMTP认证时使用的密码


/// </summary>


private string password="";




/**//// <summary>


/// 是否需要SMTP验证


/// </summary>


private bool ESmtp=false;




/**//// <summary>


/// 是否Html邮件


/// </summary>


public bool Html=false;




/**//// <summary>


/// 邮件附件列表


/// </summary>


private System.Collections.ArrayList Attachments;




/**//// <summary>


/// 邮件发送优先级，可设置为"High","Normal","Low"或"1","3","5"


/// </summary>


private string priority="Normal";




/**//// <summary>


/// 邮件主题


/// </summary>


public string Subject="";




/**//// <summary>


/// 邮件正文


/// </summary>


public string Body="";




/**//// <summary>


/// 收件人数量


/// </summary>


private int RecipientNum=0;




/**//// <summary>


/// 最多收件人数量


/// </summary>


private int recipientmaxnum=1;




/**//// <summary>


/// 密件收件人数量


/// </summary>


//private int RecipientBCCNum=0;




/**//// <summary>


/// 错误消息反馈


/// </summary>


private string errmsg;




/**//// <summary>


/// TcpClient对象，用于连接服务器


/// </summary>


private TcpClient tc;




/**//// <summary>


/// NetworkStream对象


/// </summary>


private NetworkStream ns;




/**//// <summary>


/// SMTP错误代码哈希表


/// </summary>


private Hashtable ErrCodeHT = new Hashtable();




/**//// <summary>


/// SMTP正确代码哈希表


/// </summary>


private Hashtable RightCodeHT = new Hashtable();


public ESmtpMail()




...{


Attachments = new System.Collections.ArrayList();


}




/**//// <summary>


/// 邮件服务器域名和验证信息


/// 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>


/// 邮件服务器端口号


/// </summary>


public int MailDomainPort




...{


set




...{


mailserverport=value;


}


}










/**//// <summary>


/// SMTP认证时使用的用户名


/// </summary>


public string MailServerUserName




...{


set




...{


if(value.Trim()!="")




...{


username=value.Trim();


ESmtp=true;


}


else




...{


username="";


ESmtp=false;


}


}


}






/**//// <summary>


/// SMTP认证时使用的密码


/// </summary>


public string MailServerPassWord




...{


set




...{


password=value;


}


}






/**//// <summary>


/// 邮件发送优先级，可设置为"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>


/// 错误消息反馈


/// </summary>


public string ErrorMessage




...{


get




...{


return errmsg;


}


}










/**//// <summary>


/// 服务器交互记录


/// </summary>


private string logs="";






/**//// <summary>


/// 服务器交互记录，如发现本组件不能使用的SMTP服务器，请将出错时的Logs发给我（lion-a@sohu.com），我将尽快查明原因。


/// </summary>


public string Logs




...{


get




...{


return logs;


}


}












/**//// <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="estr">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="dstr">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>


/// 添加邮件附件


/// </summary>


/// <param name="path">附件绝对路径</param>


public void AddAttachment(string path)




...{


Attachments.Add(path);


}










/**//// <summary>


/// 添加一个收件人


/// </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+="收件人过多";


return false;


}


}








/**//// <summary>


/// 最多收件人数量


/// </summary>


public int RecipientMaxNum




...{


set




...{


recipientmaxnum = value;


}


}








/**//// <summary>


/// 添加一组收件人（不超过recipientmaxnum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recipientmaxnum个）</param>


public bool AddRecipient(string[] str)




...{


for(int i=0;i<str.Length;i++)




...{


if(!AddRecipient(str[i]))




...{


return false;


}


}


return true;


}






/**//// <summary>


/// 发送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="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 = "";


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;


return Returnvalue;


}


}








/**//// <summary>


/// 与服务器交互，发送一条命令并接收回应。


/// </summary>


/// <param name="Command">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;


}








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;




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;//内容格式和分隔符


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,"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;


}








/**//// <summary>


/// 发送邮件方法，所有参数均通过属性设置。


/// </summary>


public bool Send()




...{


if(Recipient.Count==0)




...{


errmsg="收件人列表不能为空";


return false;


}




if(mailserver.Trim()=="")




...{


errmsg="必须指定SMTP服务器";


return false;


}




return SendEmail();




}








/**//// <summary>


/// 发送邮件方法


/// </summary>


/// <param name="smtpserver">smtp服务器信息，如"username:passwordwww.smtpserver.com:25"，也可去掉部分次要信息，如www.smtpserver.com"</param>


public bool Send(string smtpserver)




...{




MailDomain=smtpserver;


return Send();


}








/**//// <summary>


/// 发送邮件方法


/// </summary>


/// <param name="smtpserver">smtp服务器信息，如"username:passwordwww.smtpserver.com:25"，也可去掉部分次要信息，如www.smtpserver.com"</param>


/// <param name="from">发件人mail地址</param>


/// <param name="fromname">发件人姓名</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邮件</param>


/// <param name="subject">邮件主题</param>


/// <param name="body">邮件正文</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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