mail forward if unread

[Patrick Paysant]

Hi

I have a little (humm) problem.

I'm using qmail. When the mails arrive, it's dispatched in
all the users mailboxes. Ok.
Now, what I want to do is to forward the mails if they are
not read after one hour (for instance).
I'm not sure it is clear, so here is an example :

Mail #1 arrive at 9H00AM to Joe.
Joe is not here today.
I want that this mail to be forwarded at 10h00AM
to Bill.

Is there any program doing that ?

TIA

Patrick