[C] pop3 client funzt nicht...

[SUCHTI]

Ich weiss nicht was ich falsch mache...
hat mir jemand ein tipp??

main.c

#include <stdio.h>
#include <windows.h>
#include <winsock2.h>
#include "mail.h"
using namespace std;
int main(int argc, char *argv[])
{  
int port = 1836;
  SOCKET s;
  long rc;
  printf("-=-=-=-=-=-=-=-=-=-=-=-=-==-=-=-=-=-=-=-=-\n");
  printf("                                  MAIL               \n");
  printf("-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-\n\n");
  rc = startup();
  if(rc != 0)
  {
        printf("Verbindung Fehlgeschlagen: startup()\n");
        system("pause");
        return -1;
  }
  s = socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
  if(s==SOCKET_ERROR)
  {
        printf("Verbindung Fehlgeschlagen: socket()\n");
        system("pause");
        return -1;
  }
  SOCKADDR_IN addr;
  addr.sin_family = AF_INET;
  addr.sin_port = htons(110);
  addr.sin_addr.s_addr = inet_addr("195.186.81.55");
  printf("connect...\n");
  rc = connect(s,(SOCKADDR*)&addr,sizeof(addr));
  if(rc == -1)
  {
        printf("Verbindung Fehlgeschlagen: connect()\n");
        system("pause");
        return -1;
  }
  char aaa[100];
  recv(s,aaa,strlen(aaa),0);
  doo(aaa);
  while(1)
  {
  char buffer[100];
  char auth[100];
  printf("AUTH: ");
  gets(auth);
  strcat(auth,"\r\n");
  send(s,auth,strlen(auth),0);
  rev(s,buffer);
  doo(buffer);
  memset(buffer,'0',strlen(buffer));
  }
  system("pause");
  return 0;
}

mail.h

int startup()
{
    WSADATA wsa;
    return WSAStartup(MAKEWORD(2,0),&wsa);
}
int sen(SOCKET s,char *buffer)
{
    int a;
    a = send(s,buffer,strlen(buffer),0);
    if(a<0)
    {
           return -1;
    }
    return 0;
}
int rev(SOCKET s,char *buffer)
{
    char b[0];
    char a[strlen(buffer)];
    int i;
    for(i=0;i<strlen(buffer);i++)
    {
        recv(s,buffer,strlen(b),0);
        a[i] = buffer[0];
    }
    buffer = a;
    return 0;
}
void doo(char *buffer)
{
     int i=0;
     for(i=0;i<strlen(buffer);i++)
     {
         printf( "%c" , buffer[i] );
     }
}

Als erstes sollte eigentlich: +OK Dovecot Ready. stehen.
usw..