do_start

# File lib/net/pop.rb, line 437
    def do_start( account, password )
      @socket = self.class.socket_type.old_open(@address, @port,
                                   @open_timeout, @read_timeout, @debug_output)
      on_connect
      @command = POP3Command.new(@socket)
      if apop?
        @command.apop account, password
      else
        @command.auth account, password
      end
      @started = true
    ensure
      do_finish if not @started
    end