[exim] How to change domain of mail coming from internet

I have an exchange box with domain1.com and a lotus domino with
domain2.com on it.
I want to be able to change all incoming mail from the net for users on
the domino to domain2.com.
Mail from the net is coming in as domain1.com to my exim box.

Say I have paul (paul@???) on the lotus notes server. I would like
mails coming to paul@??? to be rewritten to paul@???

Thanks

Gareth Segree
Technical Support Analyst
The Gleaner Company Limited
Tel: 9223400 (Ext 6345)