[exim] retry rule

Hello list

How can i make sure that a retry rule for one custum domain is working.
I use exim 4.63 on debian etch as a relay gateway.
The default retry rule will drop undelivereble mail after 4d.
I now have one relay domain that are offline for unspesified time and i
need to keep all the mail until domain email server is back online.

I have added a retry rule to keep the mail for a long time but i would
like to test it before the normal 4d on Q expire.

Johan Loubser