I want to host a number of customers on our Exchange 2003 server. I want to be able to host domain1.co.uk, domain2.co.uk and domain3.co.uk. My default domain would be domain1.co.uk.
I then want to enable some way of getting at their mail. For instance OWA or POP3.
What I then need to be able to do is ensure that email@example.com sends his mail from firstname.lastname@example.org and email@example.com to send mail from firstname.lastname@example.org etc.
My default domain has a mail relay server set from our ISP.
I'm assuming this is relatively simple with Exchange 2003, but my question is how can I achieve that?