How to receive messages for two SMTP domains using Exchange Server 2003

To receive messages from two Simple Mail Transfer Protocol (SMTP) domains in Exchange Server:

1. Start Exchange System Manager.

2. Browse to Organization\Recipients\Recipient Policies.

3. Right-click Default Policy, and then click Properties.

4. Click the E-Mail Addresses tab, and then click New.

5. Click SMTP Address, and then click OK.

6. Verify that the This Exchange Organization is responsible for all mail delivery to this address check box has been selected.

7. In the Address box, type the new SMTP domain name (for example, @companyb.com), and then click OK.

8. Click the E-Mail Addresses tab, and then click the new SMTP item to enable it.

9. Click the SMTP item, and then click Set as Primary.

This address is now the sender's reply SMTP address.

Click OK to apply the change.

10. Restart the Microsoft Exchange information store service.