How to Verify That Exchange 2003 is Configured to Not Resolve Anonymous Mail

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Exchange 2000 servers resolve anonymous e-mail by default. If your organization contains Exchange 2000 servers, and they resolve an anonymous e-mail message and send it to an Exchange 2003 server, the address resolves to its display name in the global address book (GAL). To prevent this, configure your Exchange 2000 servers so that they do not resolve anonymous mail.

Note

Incorrectly editing the registry can cause serious problems that may require you to reinstall your operating system. Problems resulting from editing the registry incorrectly may not be able to be resolved. Before editing the registry, back up any valuable data.

Before You Begin

Before you perform the procedure in this topic, read Configuring Filtering and Controlling Spam.

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 administrative group level

Procedure

To verify that your Exchange 2003 server is configured to not resolve anonymous mail

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

  2. In the console tree, expand Servers, expand < Bridgehead Server Name >, expand Protocols, and then expand SMTP.

  3. Right-click the SMTP virtual server that you want, and then click Properties.

  4. On the Access tab, click Authentication.

  5. In Authentication, under the Anonymous access check box, verify that the Resolve anonymous e-mail check box is cleared.

    Note

    Remember that if this server is an internal SMTP virtual server, you can also clear the Anonymous access check box. For more information about anonymous access on an internal SMTP virtual server, see "Preventing Anonymous Access on Internal SMTP Virtual Servers and Dedicated SMTP Virtual Servers for IMAP and POP Clients" in Securing Your Exchange Server.