As above please Thanks Daren

If it is from Internet , You may require and additional MX record . configure SMTP or internet facing connector to receive e-mail change appropaite settings if you want to relay etc and may also need to use recipeint policies for email address generation would be helpful http://support.microsoft.com/kb/265293

This is the simple guide to accomplish your goal. http://www.petri.co.il/configure_exchange_2000_2003_to_receive_email_for_other_domains.htm It is picture guide about smtp connecter http://www.msexchange.org/tutorials/Exchange-2003-SMTP-Namespace-Sharing.html