Microsoft KB Archive/278838

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XCON: Cannot Send Mail to SMTP Domain That Is the Same as the Local Exchange Organization Domain

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Q278838

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The information in this article applies to:


 * Microsoft Exchange 2000 Server

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SYMPTOMS
By default, if a group of e-mail recipients in an Exchange 2000 message handling system and a group of recipients in a foreign e-mail system (UNIX SendMail, for example) share the same SMTP domain, mail does not flow from Exchange 2000 to the foreign recipients. Exchange 2000 generates non-delivery reports (NDRs).

CAUSE
This behavior occurs because the recipients are not found in Active Directory.

RESOLUTION
To enable mail to flow to the foreign system, follow the steps in the following procedures.

In Exchange System Manager:


 * 1) Open the properties of the default SMTP virtual server.
 * 2) Click the Messages tab.
 * 3) In the Forward all mail with unresolved recipients to host field, type the fully qualified domain name (FQDN) of the destination host or IP address in square brackets ([]).
 * 4) Underneath Global Settings in Exchange System Manager, click Recipients, and then click Recipient Policies.
 * 5) Open the default Recipient Policy properties, click the Email Addresses (Policy) tab, click the primary SMTP address, and then click Edit. If there is more than one SMTP address listed, the primary SMTP address is the one in bold.
 * 6) Note the check box at the bottom of the property page for the This Exchange Organization is responsible for all mail delivered to this address option. This means that if Exchange 2000 does not find a match in Active Directory for a recipient with this SMTP proxy, Exchange 2000 generates an NDR. Because this is currently the primary SMTP address, this check box is unavailable and cannot be cleared. You must create a new SMTP generation rule for this policy, and make it the primary.
 * 7) Click Cancel to close the properties for this particular SMTP address generation rule, and then click the New button at the bottom of the dialog box.
 * 8) Click SMTP Address, and then type something similar to @test.companyname.com. Click OK.
 * 9) Click the new @test.companyname.com SMTP address generation rule, and then click Set as Primary.
 * 10) Open the properties of the @companyname.com SMTP address generation rule, and click to clear the This Exchange Organization is responsible for all mail delivered to this address check box.
 * 11) Click OK, and then click Set as Primary so that this continues to be the primary (reply) SMTP address for internal recipients.
 * 12) Delete the @test.companyname.com SMTP address generation rule, because you only created it for the purpose of step 9.

NOTE: If you enable this configuration, you do not need to make any change to the Address Space of the SMTP connector. You do not need to specify an Address Space of *@companyname.com; an Address Space of * works just as well. As a matter of fact, having an Address Space that matches internal proxy addresses may cause routing problems, depending on other configuration options.
 * 1) In Exchange System Manager, expand Recipients, and then click Recipients Update Services.
 * 2) Right-click the Domain Recipient Update Service (not Enterprise Configuration), and then click Update Now. Allow time for this change to be replicated to all domain controllers.

Additional query words: NDR, &quot;simple mail transfer protocol&quot; EMS MHS

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Issue type : kbprb

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