NOOP untagged response sent by Zimbra about net-imap

[c-leroy]

Ignoring these responses seems to be sufficient. I ignored 12 of these during a CLOSE request that lasted around 3-5 minutes, without side-effect, using this hack :

module Net
  class IMAP
    class ResponseParser
      def parse(str)
        @str = str
        @pos = 0
        @lex_state = EXPR_BEG
        @token = nil
        if @str == "* NOOP\r\n"
          STDERR.puts "\e[31;1mGOT NOOP untagged response! Ignoring it.\e[0m"
          return 42
        end
        return response
      end
    end
  end
end

[c-leroy]

From Zimbra source code, it can send this during expunge, store and copy progress, every 15 seconds. For example:

https://github.com/Zimbra/zm-mailbox/blob/326aabc7b5e41de6fe1d1f0734be78c2c01609c2/store/src/java/com/zimbra/cs/imap/ImapHandler.java#L3502-L3507

I found no easy way to report this issue to Zimbra.