Microsoft KB Archive/921291

= The Sender ID filter may reject e-mail that is sent from an IP address that is associated with an SPF record that contains &quot;v=spf1 mx -all&quot; in Exchange Server 2003 =

Article ID: 921291

Article Last Modified on 10/25/2007

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APPLIES TO


 * Microsoft Exchange Server 2003 Standard Edition
 * Microsoft Exchange Server 2003 Enterprise Edition

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SYMPTOMS
Consider the following scenario. You create a Sender of Policy Framework (SPF) record in Microsoft Windows Server 2003 Domain Name System (DNS). You enable Sender ID Filtering on a Simple Mail Transfer Protocol (SMTP) virtual server in Microsoft Exchange Server 2003 Service Pack 2 (SP2). In this scenario, the Sender ID filter may reject e-mail that is sent from an IP address that is associated with an SPF record that contains the following text:

v=spf1 mx -all



Hotfix information
A supported hotfix is now available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

http://go.microsoft.com/?linkid=6294451

Note If additional issues occur or any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. To create a separate service request, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Prerequisites
You must have Exchange Server 2003 SP2 installed to apply this hotfix.

Restart requirement
You do not have to restart the computer after you apply this hotfix. However, Microsoft Internet Information Services (IIS) Admin Service and all dependent services are stopped and then restarted when you apply this hotfix.

Hotfix replacement information
This hotfix does not replace any other hotfix.

File information
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.



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



MORE INFORMATION
Notes
 * After you apply this hotfix, you may notice a small increase in DNS query traffic.
 * MX records must not point to CNAME records.

For more information about how to configure Sender of Policy Framework records in the Windows Server 2003 Domain Name System, click the following article number to view the article in the Microsoft Knowledge Base:

912716 How to configure Sender of Policy Framework records in the Windows Server 2003 Domain Name System

For more information, click the following article numbers to view the articles in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

817903 New naming schema for Exchange Server software update packages

Keywords: kbhotfixserver kbqfe kbfix kbbug kbpubtypekc KB921291

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