uses
  IdHTTP, IdSSLOpenSSL;

function TfrmMain.Login: string;
var
  IdHTTP: TIdHTTP;
  Request: TStringList;
  Response: TMemoryStream;
  SSLHandler: TIdSSLIOHandlerSocketOpenSSL;
begin
  Result := '';
  try
    Response := TMemoryStream.Create;
    try
      Request := TStringList.Create;
      try
        Request.Add('op=login');
        Request.Add('redirect=http://newyork.craigslist.org/');
        Request.Add('login=' + myEmail);
        Request.Add('password=' + myPassword);
        IdHTTP := TIdHTTP.Create;
        try
          SSLHandler := TIdSSLIOHandlerSocketOpenSSL.Create(nil);
          try
            SSLHandler.SSLOptions.Method := sslvSSLv3;
            SSLHandler.SSLOptions.Mode := sslmUnassigned;

            IdHTTP.IOHandler := SSLHandler;
            IdHTTP.AllowCookies := True;
            IdHTTP.HandleRedirects := True;
            IdHTTP.Request.ContentType := 'application/x-www-form-urlencoded';
            IdHTTP.Post('https://accounts.craigslist.org/login', Request, Response);
            Result := IdHTTP.Get('https://accounts.craigslist.org/');
          finally
            SSLHandler.Free;
          end;
        finally
          IdHTTP.Free;
        end;
      finally
        Request.Free;
      end;
    finally
      Response.Free;
    end;
  except
    on E: Exception do
      ShowMessage(E.Message);
  end;
end;