#include?“base64h.h“
#include??
#pragma?comment（lib?“ws2_32“）??
#include?
using?namespace?std;
#define?SERVER_PORT?8002
int?main（）
{
	char?*userName[]?=?{“yangwan@myself.com““xiaoxiao@myself.com““123@myself.com““yangxiao@myself.com“};
	char?*userPassword?=?“yangwan“;
	char?tempbuff[1024]?=?{0};
	char?tempb[128]?=?{0};
	WORD?socketVersion;
	WSADATA?wsaData;
	SOCKET?listenSocketserverSocket;
	struct?sockaddr_in?clientAddr;
	struct?sockaddr_in?serverAddr;
	int?return_num?=?0;
	socketVersion?=?MAKEWORD（22）;
	return_num?=?WSAStartup（socketVersion&wsaData）;
	if（return_num?!=?0）
	{
		cout<<“WSAStartup?Failed“<		return?-1;
	}
	if（LOBYTE（wsaData.wVersion）?!=?2?||?HIBYTE（wsaData.wVersion?!=?2））
	{
		cout<<“Socket?Version?is?Wrong!“<		return?-1;
	}
	cout<<“Init?Socket?Environment?Successfully“<	/*****************************************************/
	listenSocket?=?socket（AF_INETSOCK_STREAMIPPROTO_TCP）;
	if（listenSocket?==?INVALID_SOCKET）
	{
		cout<<“Create?Listen?Socket?Failed“<		?WSACleanup（）;?
		return?-1;
	}else
	{
		cout<<“Create?Listen?Socket?Successfully“<	}
	serverAddr.sin_family?=?AF_INET;??//地址家族sin_family一般Tcp/ip地址家族為AF_INET???
????serverAddr.sin_port?=?htons（SERVER_PORT）;//將端口號轉化為網絡字節??
????serverAddr.sin_addr.S_un.S_addr?=?htonl（INADDR_ANY）;//使用INADDR_ANY指定任意地址??
	return_num?=?bind（listenSocket（struct?sockaddr*）&serverAddrsizeof（serverAddr））;
	if（return_num?==?SOCKET_ERROR）
	{
		cout<<“Bind?the?Port?Errors“<		closesocket（listenSocket）;??
????????WSACleanup（）;???
	}else
	{
		cout<<“Bind?the?Port:?“<	}
	while（true）
	{
		cout<<“Listenning?...................“<		return_num?=?listen（listenSocket10）;
		if（return_num?==?SOCKET_ERROR）
		{
			cout<<“There?are?some?problem?in?the?socket?listenning“<			cout<<“The?informatio?of?the?Listen?Error:“<			closesocket（listenSocket）;??
			WSACleanup（）;?
			return?-1;
		}else
		{
			int?clientAddrLen?=?sizeof（clientAddr）;
			serverSocket?=?accept（listenSocket（struct?sockaddr*）&clientAddr&clientAddrLen）;
			if（serverSocket?==?INVALID_SOCKET）
			{
				cout<<“Create?ServerSocket?Failed“<				int?num;
				cin>>num;
				continue;
			}else
			{
				cout<<“Server?has?Receive?the?Client‘s?Requests“<				cout<<“The?IP?of?the?Client:?“<				//inet_ntoa（char*）將網絡地址轉換成點分十進制的形式???
				cout<<“The?PORT?of?the?Client:?“<				//ntohs?（network?to?host?short）作用是將一個16位數由網絡字節順序轉換為主機字節順序
				strcpy（tempbuff“Welcome?to?YangWan‘s?Mail?Server!\r\n“）;
				send（serverSockettempbuffstrlen（tempbuff）0）;
				recv（serverSockettempb1280）;
				cout<<“Client?:?“<				if（strncmp（tempb“EHLO“4）?==?0）
				{
					strcpy（tempb“This?is?YangWan‘s?MailServer\r\n“）;
					send（serverSockettempbstrlen（tempb）0）;
					mem