I have a single machine connected to the internet 24/7, and configured as a Sendmail mail server for a domain, say a.com. I would like to configure it as a mail server for another domain, say a.org. The problem is that I must have different accounts for each of the two domains. In other words, I would like to have the option of making an account firstname.lastname@example.org without an account email@example.com working, and vice versa.
I don't know if virtual hosting can do this.
My machine can use two IP's to appear as two servers to the world..
Can this be done?