esmtp.cs

ASP.NET构建的笑傲江湖社区(C#,全源码提供)

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

namespace xajh
{
	public class ESmtpMail
	{
		/// <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>
		/// 邮件服务器域名
		/// </summary>	
		private string mailserver = "";

		/// <summary>
		/// 邮件服务器域名和验证信息
		/// 形如："user:[e-mail]:25"，也可省略次要信息。如"user:[e-mail]"或"www.server.com"
		/// </summary>	
		public string MailDomain
		{
			set
			{
				string maidomain = value.Trim();
				int tempint;

				if(maidomain != "")
				{
					tempint = maidomain.IndexOf("@");
					if(tempint != -1)
					{
						string up = maidomain.Substring(0,tempint);
						MailServerUserName = up.Substring(0,up.IndexOf(":"));
						int upindex = up.IndexOf(":");
						MailServerPassWord = up.Substring(upindex + 1,up.Length - upindex - 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>	
		private int mailserverport=25;

		/// <summary>
		/// 邮件服务器端口号
		/// </summary>	
		public int MailDomainPort
		{
			set
			{
				mailserverport = value;
			}
		}

		/// <summary>
		/// 是否需要SMTP验证
		/// </summary>		
		private bool ESmtp = false;

		/// <summary>
		/// SMTP认证时使用的用户名
		/// </summary>
		private string username = "";

		/// <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>
		private string password = "";

		/// <summary>
		/// SMTP认证时使用的密码
		/// </summary>
		public string MailServerPassWord
		{
			set
			{
				password = value;
			}
		}	

		/// <summary>
		/// 邮件主题
		/// </summary>		
		public string Subject = "";
        
		/// <summary>
		/// 是否Html邮件
		/// </summary>		
		public bool Html = false;

		/// <summary>
		/// 邮件正文
		/// </summary>		
		public string Body = "";

		/// <summary>
		/// 收件人列表
		/// </summary>
		private Hashtable Recipient = new Hashtable();

		/// <summary>
		/// 密送收件人列表
		/// </summary>
		private Hashtable RecipientBCC = new Hashtable();

		/// <summary>
		/// 邮件发送优先级，可设置为"1","3","5"
		/// </summary>
		private string priority = "3";

		/// <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 = "1";
						break;
					case "1":
						priority = "1";
						break;
					case "normal":
						priority = "3";
						break;
					case "3":
						priority = "3";
						break;
					case "low":
						priority = "5";
						break;
					case "5":
						priority = "5";
						break;
					default:
						priority = "3";
						break;
				}
			}
		}

		/// <summary>
		/// 错误消息反馈
		/// </summary>
		private string errmsg;

		/// <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。
		/// </summary>
		public string Logs
		{
			get
			{
				return logs;
			}
		}

		private string enter = "\r\n";
		/// <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();

		/// <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<CRLF>.<CRLF>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 estr)
		{
			byte[] barray;
			barray = Encoding.Default.GetBytes(estr);
			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 dstr)
		{
			byte[] barray;
			barray = Convert.FromBase64String(dstr);
			return Encoding.Default.GetString(barray);
		}

		public ESmtpMail()
		{
		}

		~ESmtpMail()
		{
			ns.Close();
			tc.Close();
		}

		/// <summary>
		/// 收件人姓名
		/// </summary>	
		public string RecipientName = "";
		private int RecipientNum = 0;//收件人数量
		private int RecipientBCCNum = 0;//密件收件人数量

		/// <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 < 10)
			{
				Recipient.Add(RecipientNum,str);
				RecipientNum ++;
				return true;
			}
			else
			{
				errmsg += "收件人过多";
				return false;
			}
		}

		/// <summary>
		/// 添加一组收件人（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 AddRecipient(string[] str)
		{
			for(int i = 0; i < str.Length; i ++)
			{
				if (!AddRecipient(str[i]))
				{
					return false;