[exim] date/time when ratelimit "expires"

Hi.

How to show when particular ratelimit goes below threshold? Can that be
extracted/calculated from exim?

For example, with these rules:
https://lists.gt.net/exim/users/94666#94666

I would like to change message to contain ratelimit expiry date like:

drop message = Too many failed authentication attempts (blockade expires:
$HERE_DATE_WHEN)

How to do that?

--
Arkadiusz Miśkiewicz, arekm / ( maven.pl | pld-linux.org )