Email服务器

开发平台：
C#

SMTP.cs：源码内容
							using System;
using System.Collections.Generic;
using System.Text;
using System.Net.Sockets;
using System.IO;
namespace SoketEmail
{
    public class SMTP
    {
        public SMTP() { }
        public bool Send(string strSmtpServer, int nPort, string strSend, string strReceive
            , string strSubject, string strContent)
        {
            string smtpserver = strSmtpServer;// smtp服务器的IP地址
            TcpClient tcpc = new TcpClient();
            try
            {
                tcpc.Connect(smtpserver, nPort);
                StreamReader sr;
                string strCmd;
                sr = new StreamReader(tcpc.GetStream(), Encoding.Default);
                //服务器连接成功以后，首先向服务器发送HeLlo命令
                strCmd = "HELO shaozhd";
                SenSmtpCmd(tcpc, strCmd);
                //然后向服务器发送信件的成员的信箱
                strCmd = "mail from:" + strSend;
                SenSmtpCmd(tcpc, strCmd);
                //向服务器发送收件人的信箱
                strCmd = "rcpt to:" + strReceive;
                SenSmtpCmd(tcpc, strCmd);
                //所有的准备工作都已经作好了,下面开始进行邮件的部分
                strCmd = "data";
                SenSmtpCmd(tcpc, strCmd);
                //邮件内容
                strCmd = "Date: 1234567rn";
                strCmd = strCmd + "From: " + strSend + "rn";
                strCmd = strCmd + "To: " + strReceive + "rn";
                strCmd = strCmd + "Subject: " + strSubject + "rnrn";
                strCmd = strCmd + strContent + "rnrn";
                SenSmtpCmd(tcpc, strCmd);
                strCmd = "rn.rn";
                SenSmtpCmd(tcpc, strCmd);
                //最后 关闭与smtp 服务器的连接
                tcpc.Close();
                return true;
            }
            catch
            {
                return false;
            }
        }
        void SenSmtpCmd(TcpClient tcpc, String strCmd)
        {
            byte[] arrCmd;
            string strRet;
            StreamReader sr;
            Stream s;
            s = tcpc.GetStream();
            strCmd = strCmd + "rn";
            arrCmd = Encoding.Default.GetBytes(strCmd.ToCharArray());
            s = tcpc.GetStream();
            s.Write(arrCmd, 0, strCmd.Length);
            //以下用于程序调试，显示服务器回应信息
            sr = new StreamReader(tcpc.GetStream(), Encoding.Default);
            strRet = sr.ReadLine();
            return;
        }
    }
}

						