Oleg Orlov

#include <iostream>
#include <WinSock2.h>

#pragma comment(lib, "Ws2_32.lib")

using namespace std;

#ifdef hint
    //0x57.0xfa.0xfa.0x7c - 87.250.250.124 - imap.yandex.ru
    //0xd9.0x45.0x8a.0x48 - 217.69.138.72 - imap.mail.ru
    //0x5e.0x64.0xb8.0x4b - 94.100.184.75 - pop.mail.ru
    //0x6e - 110; 0x8f - 143
#endif

struct Header
{

public:

    SOCKET sock;
    WSAData data;
    SOCKADDR_IN client, service;

    int result, tmp;
    char buffer[0x1000];

    char *ip;
    unsigned int port;

    Header(void)
    {
        ip = "0x5e.0x64.0xb8.0x4b";
        port = 0x6e;
    };
};

struct Inet
{

public:

    int InitWSA(WSAData *data, int *result)
    {
        *result = WSAStartup(0x202, data);
        cout << (*data).szDescription << " " << (*data).szSystemStatus << endl;
        return (*result);
    };

    void InitSockaddr_in(SOCKADDR_IN *addr, char *ip, unsigned int *port)
    {
        (*addr).sin_addr.s_addr = inet_addr(ip);
        (*addr).sin_family = AF_INET;
        (*addr).sin_port = htons((*port));
    };

    void HandleResponse(char *response)
    {
        int i = 0;

        do
        {
            cout << response[i];
            i++;
        } while((int)response[i] != -52);

        for(i = 0; i < strlen(response); i++) response[i] = (char)-52;
    };

    int SendData(SOCKET *sock, char *cmd)
    {
        return send((*sock), cmd, strlen(cmd), 0);
    };

    void GetResponse(SOCKET *sock, char *buffer)
    {
        Sleep(500);
        int result = recv((*sock), buffer, strlen(buffer), 0);
        HandleResponse(buffer);
    };

};

void main(void)
{
    Header *head = new Header();
    Inet *object = new Inet();

    object->InitWSA(&head->data, &head->result);
    object->InitSockaddr_in(&head->service, head->ip, &head->port);

    head->sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    head->result = connect(head->sock, (sockaddr*)&head->service, sizeof(head->service));

    object->GetResponse(&head->sock, head->buffer);

    object->SendData(&head->sock, "user mylogin\r\n");
    object->GetResponse(&head->sock, head->buffer);

    object->SendData(&head->sock, "pass mypass\r\n");
    object->GetResponse(&head->sock, head->buffer);

    object->SendData(&head->sock, "stat\r\n");
    object->GetResponse(&head->sock, head->buffer);

    object->SendData(&head->sock, "retr 110\r\n");
    object->GetResponse(&head->sock, head->buffer);

    delete object;
    delete head;
    system("pause");
};