Outlook 2003 - Can I install two domain names on the same computer?

Yes of course you can. regard it as a phone system in your two phone house, both phones ring, if you were to pick up both they would both work. .. your two address are the limit. It would help you to understand if you go to the top tool bar while in outlook, click the little drop-down arrow attached to "Send/receive" tab, that's the little arrow to the right of that tab. here you'll see that you can call up all your mail from different address or choice to call different address's singularly...In short, yes you can do what you are trying to do, its designed that way