# File lib/vmail/imap_client.rb, line 100
    def get_highest_message_id
      # get highest message ID
      res = @imap.fetch([1,"*"], ["ENVELOPE"])
      if res 
        @num_messages = res[-1].seqno
        log "HIGHEST ID: #@num_messages"
      else
        @num_messages = 1
        log "NO HIGHEST ID: setting @num_messages to 1"
      end
    end