[Exim] Alias Files

We are configuring our E-Mail over here to have two mail servers - one for
staff and one for students. Our mail hub will be the student server where
we will also do the virus checking
The problem is how best to have alias files which would direct the Staff
E-mail (in the form of I.Surname@???) to the staff server. Staff will
not have accounts on the mail hub - so all the forwarding will have to be
done in the config file.
Can I use LDAP to do this? How efficient will it be? Also if I use
/etc/aliases file or something like that will it work? I would appreciate
any input on this.

many thanks

Sujit Choudhury

University of North London