[Exim] exim queue - a problem

I use Exim 4.12 on FreeBSD 4.7.
Sometimes one user sends one message to many recepients and then I often see
that the message stays in queue for long time.
This happens when one of the recepients has problem with his host/network
etc and the message cannot be delivered to him.

And then exim delays delivering emails to other recepients on other hosts
until it delivers mail to this one problematic recepient.

Is it possible to configure exim such way, that exim will send messages from
the queue to all other recepients skipping the recepients which are
unaccessable for some reason?

Of course the problematic recepients would stay in the queue according to
the Retry Rules, but they should not delay deliveries to other recepients.

Regards,
Robert