Distributed mail servers

Maybe I'm not using the right search terms, but I can't find any
information about distributed mail servers.

Exchange/AD does this well - when an email comes in it checks which
server the user's account is on and sends the message there. That way
you have one incoming front end server, but several mail stores based
on geography. Then I don't have to get my mail from a server across
the country.

I think I've thought of a fairly straight forward way to make
exim+LDAP do this, but I would have though information would already
be out there.

Anyone have any information?

Thanks.
Received on Wed Jan 3 16:32:33 2007