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Unsupported SMTP Domain Wildcard Found

[This topic is intended to address a specific issue called out by the Exchange Server Analyzer Tool. You should apply it only to systems that have had the Exchange Server Analyzer Tool run against them and are experiencing that specific issue. The Exchange Server Analyzer Tool, available as a free download, remotely collects configuration data from each server in the topology and automatically analyzes the data. The resulting report details important configuration issues, potential problems, and nondefault product settings. By following these recommendations, you can achieve better performance, scalability, reliability, and uptime. For more information about the tool or to download the latest versions, see "Microsoft Exchange Analyzers" at http://go.microsoft.com/fwlink/?linkid=34707.]  

Topic Last Modified: 2007-11-28

The Microsoft Exchange Server Analyzer Tool displayed this warning because there is a Simple Mail Transfer Protocol (SMTP) connector in the current Exchange environment that is using a domain wildcard notation that is not supported by Microsoft Exchange Server 2007.

The Exchange Analyzer has detected an SMTP connector using a domain wildcard notation in the format of *contoso.com.

For SMTP address space types, Exchange Server 2007 requires that the address space you enter be RFC 1035-compliant. For example, *, *.com, and *.contoso.com are permitted, but *contoso.com is not permitted.

An SMTP address with a wildcard notation in the format of *contoso.com would match all of the following, which may have unintended results:

  • Contoso.com
  • Marketing.contoso.com
  • MarketingContoso.com

Valid entries for the SMTP address space of a Send connector

 

Address space entry Send connector routes mail to:

*

All domains that do not have an explicit address space entry on another Send connector entry or that are not an included subdomain of an address space on another Send connector.

Contoso.com

All recipients with e-mail addresses in the Contoso.com domain.

*.Contoso.com

All recipients with e-mail addresses in the Contoso.com domain or any subdomain of Contoso.com. In the Exchange Management Console, select Include all subdomains to set this configuration.

To address this warning, modify the SMTP connector address space to a supported domain wildcard notation, and then rerun Exchange 2007 setup.

To modify the address space on the SMTP connector with Exchange Server 2003
  1. In Exchange System Manager, expand Connectors by performing one of the following steps:

    • If you do not have routing groups or administrative groups displayed, expand your Exchange organization, and then expand Connectors.
    • If you have only routing groups displayed, expand Routing Groups, expand <Routing Group Name>, and then expand Connectors.
    • If you have only administrative groups displayed, expand Administrative Groups, expand <Administrative Group Name>, and then expand Connectors.
    • If you have administrative groups and routing groups displayed, expand Administrative Groups, expand <Administrative Group Name>, expand Routing Groups, expand <Routing Group Name>, and then expand Connectors.
  2. Right-click <your SMTP connector>, and then click Properties.

  3. Click the Address tab.

  4. Modify the address space so that the domain wildcard notation conforms to the valid address space entries from the table above.

 
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