A hotfix is available to enable the Computational Proof functionality to obtain a list of RFC 2821 recipients from a computer that is running Windows Server 2003 (922105)

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Microsoft Exchange Server 2003 Service Pack 2 (SP2) includes IMF version 2. IMF version 2 uses SmartScreen technology. IMF version 2 also provides a framework to enable the Computational Proof functionality. Computational Proof reduces the chance that legitimate e-mail messages are interpreted as unsolicited commercial e-mail (UCE).

Note UCE is also known as spam.

The Computational Proof functionality requires access to a list of RFC 2821 recipients to work correctly. However, Microsoft Exchange Server 2003 does not expose the ability to obtain a list of RFC 2821 recipients.

Hotfix information

A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Windows Server 2003 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Prerequisites

You must have Microsoft Windows Server 2003 Service Pack 1 (SP1) installed to apply this hotfix. For more information, click the following article number to view the article in the Microsoft Knowledge Base: Additionally, to enable the functionality that this hotfix provides, you must apply the Exchange Server 2003 hotfix that is described in the following article in the Microsoft Knowledge Base:

Restart requirement

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

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.Windows Server 2003, 32-bit x86 versions

File name	File version	File size	Date	Time	Platform
Smtpsvc.dll	6.0.3790.2748	483,328	17-Jul-2006	21:19	x86

Windows Server 2003, 64-bit x64 versions

File name	File version	File size	Date	Time	Platform
Smtpsvc.dll	6.0.3790.2748	669,184	17-Jul-2006	21:36	x64

Windows Server 2003, 64-bit IA-64 versions

File name	File version	File size	Date	Time	Platform
Smtpsvc.dll	6.0.3790.2748	1,265,664	17-Jul-2006	21:36	IA-64

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