[exim] exim listen only on some IP's

hi,

I have a linux box witch I use as mail server. In the beginning it had
only one IP, but now it has many vhosts and a lot of IP's.
Right now Exim is listening on all IP Adresses.
I whould like to configure Exim to listen only on some IP's.
How can I do this without dpkg-reconfigure?

regards
Chr. Eichert