You can route email for multiple domains to one address.
Microsoft Exchange Server is an enterprise level email host. You can host email by configuring your Domain Name System (DNS) with a new Mail Exchange (MX) record and adding the domain to Exchange. The MX record allows email to be sent externally to the domain. It is fairly common for an Exchange server to bag mail for more than one domain. Hosting multiple domains does not require any special hardware or software, but you do have to go through a few extra steps.
Instructions
Configure DNS
1. Launch the "DNS Manager" snap-in from the "Administrative Tools" menu on the server.
2. Right-click on your server name and select "New Zone."
3. Mark the radio button for "Standard Primary" and click the "Next" button.
4. Leave the "Yes" radio button marked and click "Next."
5. Type in the name of your domain (e.g. myDomain.com) in the text box and click "Next." Finish creating the forward lookup zone by clicking "Next" again.
6. Create a reverse lookup zone by clicking "Next," select the "Standard Primary" and click "Next" again.
7. Type in the IP Range prefix for your subnet (e.g. 192.168.0). Click "Next," "Next" and "Finish."
8. Right-click on your domain name under the forward lookup zone node and select "New Record."
9. Mark the radio button for "Host (A)" and click "OK."
10. Type the name of your mail domain in the "Name" text box (e.g. mail.myDomain.com) and the IP address of your email server in the IP Address text box.
11. Mark the check box for "Create associated pointer (PTR)" and click the "Add Host" button.
12. Right-click on your domain name under the forward lookup zone node and select "New Record."
13. Mark the radio button for "Mail Exchanger (MX)" and click "OK."
14. Type the name of your domain in the "Host" text box (e.g. myDomain.com) and the name of your email domain in the "Mail Server" text box (e.g mail.myDomain.com). Click "OK" to finish configuring your DNS.
Adding a Domain in Microsoft Exchange 2000/2003
15. Open the "Exchange System Manager."
16. Expand the tree on the left to your server and the "Recipients" node.
17.Click on the "Recipient Policies" node to bring up the list of policies.
18. Right-click on the "Default Recipient Policy" and select "Properties" from the pop-up menu.
19. Click on the "E-Mail Addresses (Policy)" tab to view a list of the currently hosted domains.
20. Click the "New" button then select "SMTP Address" from the list box that appears, and click the "OK" button.
21. Type in the domain name you want to bag mail for in the "Address" text box (e.g. @myDomain.com). Mark the check box for "This Exchange Organization is responsible for all mail delivery to this address" and click "OK."
22. Mark the check box for the address you just added. If you need to make the new domain the primary one, click the "Set as Primary" button. Click "OK" to save your changes.
Adding a Domain in Microsoft Exchange 2007
23. Open the "Exchange Management Console."
24. Click on "Hub Transport" under the "Organization Transportation" node.
25. Select the "Accepted Domains" tabs and then click on the "New Accepted Domain" button in the "Actions" list.
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Type in a "Name" and "Accepted Domain" for your email server (e.g. myDomain.com) in the text boxes provided.
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Mark the radio button for "Authoritative" and click the "New" button and then click "Finish."
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Click the "New E-mail Address Policy" button on the "Actions" pane.
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Type a "Name" for the policy, make sure the radio button for "All recipient types" is marked and click the "Next" button.
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Leave all the "Conditions" check boxes blank to apply this email policy to all users and then click "Next."
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Click the "Add" button. Mark the check box for "E-mail Address Local Part"and select "Use Alias."
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Mark the radio button for "Select Accepted Domain" and click the "Browse" button. Find the domain you just created and click "OK" twice.
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Click "Next" then select when you want the policy to take affect and click "Next" again.
Tags: radio button, Mark radio, Mark radio button, lookup zone, Mark check