Paolo,

> As expected, there was no significant speedup/slowdown.

Ok, thanks for your investigation.

> You might want to add a note for MySQL users to read Chapter 15 of the
> reference manual.... On chapter 15.17 I found:
>...
> So, do not waste time and resources by creating a specific index on
> quarantine.mail_id since it doesn't speedup COUNT(*) queries, which are
> anyway meaningless without a WHERE chunk_ind=1 clause.

Thanks, will add a note to README.sql  (already on the web page now).

  Mark


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