[Exim] Backup mail server

I want to set up a backup mail server. I want it to accept messages when
my main mail server is down and try to forward any messages it has
recieved to the main mail server every X minutes. Any ideas? I already
have it set up to recieve the messages but I am having trouble figureing
out how to forward them to my main server.

Thanks


--
Joe

***
I can only please one person a day.
Today is not your day and tomorrow doesn't look good either.
***