Microsoft KB Archive/829038

= Users can still send and receive e-mail messages after you disable Internet e-mail by using the Configure E-mail and Internet Connection Wizard =

Article ID: 829038

Article Last Modified on 12/3/2007

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APPLIES TO


 * Microsoft Windows Small Business Server 2003 Premium Edition
 * Microsoft Windows Small Business Server 2003 Standard Edition

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Important This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:

256986 Description of the Microsoft Windows Registry



SYMPTOMS
When you run the Configure E-mail and Internet Connection Wizard and you click Disable Internet e-mail, and then you click Next, you receive the following message:

Disabling Internet e-mail will result in being unable to send or receive e-mail from the Internet. The SmallBusiness SMTP Connector will also be deleted. For details, click More Information.

However, after you click Finish to configure your network, you experience the following problems:
 * Users on the internal network can still send e-mail messages to users on external networks.
 * Users on an external network can still send e-mail messages to users on the internal network.

You do not expect users to be able to send or to receive e-mail messages after you disable Internet e-mail on the server computer that is running Microsoft Windows Small Business Server 2003.



WORKAROUND
Warning If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.

To work around this problem, configure Exchange Server to permit internal e-mail messages but to block e-mail to and from external domains. To do this, follow these steps.

Note These steps apply to Windows Small Business Server 2003 that is running SMTP mail service. These steps do not apply to computers that are running Windows Small Business Server 2003 and that send and receive e-mail messages by using the POP3 connector, ETurn, or a Smarthost.  Run the Configure E-mail and Internet Connection Wizard to re-enable Internet e-mail for your domain. Start Exchange System Manager. To do this, click Start, point to All Programs point to Microsoft Exchange, and then click System Manager. Expand Connectors, right-click SmallBusiness SMTP connector, and then click Properties. Click the Delivery Restrictions tab, click Rejected, click Apply, and then click OK. Expand Servers, expand your computer that is running Windows Small Business Server 2003, expand Protocols, expand SMTP, right-click Default SMTP Virtual Server, and then click Properties. Click the Access tab, and then click Connection. Click Only the list below, click OK, and then click OK.</li> Exit Exchange System Manager.</li> Click Start, click Run, type regedit in the Open box, and then click OK.</li> Locate, and then click the following registry subkey:

</li> In the  key, create the following registry entry:

Entry type: REG_DWORD

Entry name:

Entry value: 1

Entry radix: hexadecimal

</li> Exit Registry Editor.</li> Restart the following services:

Microsoft Exchange Routing Engine

Simple Mail Transfer Protocol (SMTP)

</li></ol>

After you follow these steps, e-mail functionality is changed as follows: <ul> Internal e-mail functions as you expect.</li> External inbound e-mail is not delivered to the computer that is running Windows Small Business Server 2003. If you use Telnet to connect to port 25 on the external interface, you receive a blinking cursor. The SMTP server does not respond.</li> When users try to send messages to external domains, they receive the following error message:

You do not have permission to send to this recipient.

</li></ul>

<div class="status_section">

STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section of this article.

<div class="moreinformation_section">

MORE INFORMATION
For more information about Windows Small Business Server 2003, visit the following Microsoft Web site:

http://www.microsoft.com/windowsserver2003/sbs/support/default.mspx

Additional query words: mail messaging spam UCE CEICW

Keywords: kbbug kbpending KB829038

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