How to Modify the Default Recipient Policy


You cannot set Microsoft® Exchange Server to be nonauthoritative over the default recipient policy's primary SMTP address space. To prevent Exchange Server from being authoritative over this domain, you must change the default recipient policy by adding a new primary address space that is strictly for internal use. This address could be similar to @localhost, signifying that it is used solely for internal mail flow within your Exchange Server organization.

Before You Begin

Before you perform the procedure in this topic, read Deployment Scenarios for Internet Connectivity.

The following permissions are required to perform this procedure:

  • Member of the local administrators group and a member of a group that has had the Exchange Administrators role applied at the organizational level


To modify the default recipient policy

  1. Click Start, point to Programs, point to Microsoft Exchange, and then click System Manager.

  2. In the console tree, expand Recipients, and then click Recipient Policies.

  3. In the details pane, right-click your default recipient policy, and then click Properties.

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

  5. In New E-mail Address, click SMTP Address, and then click OK.

  6. In SMTP Address Properties, in the Address box, type @localhost or some other address space for which the Exchange organization can be authoritative. You can use @localhost or your Active Directory domain if it is different from your Internet domain. This address space is strictly for internal use.

  7. Verify that the This Exchange Organization is responsible for all mail delivery to this address check box is selected, and then click OK.

  8. On the E-mail Addresses (Policy) tab, click the new SMTP address you just created, and then click Set as Primary.

  9. Click the SMTP address space that you want to share (for example,, and then click Edit.

  10. To make Exchange nonauthoritative for this SMTP address, clear the This Exchange Organization is responsible for all mail delivery to this address check box, and then click Apply.

  11. A message appears asking if you want to update all corresponding recipient e-mail addresses. Click Yes.

  12. On the E-mail Addresses (Policy) tab, click OK.