Check this article for some step-by-step info for setting up a hosted
environment:
http://www.msexchange.org/tutorials/Shared_Hosting_Exchange_2003_Part1.html
and also:
hosting multiple SMTP domains
http://www.msexchange.org/tutorials/MF010.html

Signature
Bharat Suneja
MVP - Exchange
www.zenprise.com
NEW blog location:
www.exchangepedia.com/blog
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> Wishing that there was a simple way to just install exchange and place it
> out (or add some software) to make it into a hosted server, would be just
[quoted text clipped - 7 lines]
>
> Thank you all.