[exim] where to manage ratelimited accounts ?

Hello

looking around in the maillist archive I've seen a couple of ideas to manage
(warn/block) accounts that send too fast or have too many errors in the
period of time using the ratelimit condition
but I've not clear where these information are stored.

If, for example,
I ratelimit a user that send more than 100 email for hour
the count reach the limit
and after 5 minutes I manage the things and want to reenable the customer
where should I delete/manage the archived data so to restart the count ?

TIA for your help
Flaviano