[Exim] mailqueue auto-deletion

Hi,

is it possible to configure Exim in a way, so that all emails in queue
older than 24hs get deleted automatically?
I mean, i know how to clear the queue, but i would like only to delete
some of them sorted by time.

Is that possible?
Or would i have to write a script, which browses the queue and checks
the time and so deletes one email after the other (if time > 24hs) until
it checked all emails in the queue?

Regards,
Duncan