Messages are not filtered correctly when the sender's display name contains extended characters

When Filtering is enabled in Exchange 2000, some messages may be unexpectedly filtered. As a result, these messages may not delivered. This behavior occurs if the following conditions are true:

• The All message with Blank sender Filtering option is selected. To view this option, start Exchange System Manager, and then expand Global Settings. Right-click Message Delivery, click Properties, and then click the Filtering tab.
• The incoming SMTP message contains extended characters in the RFC822 sender display name.

If you select the Archive filtered messages option on the Filtering tab, you can check what messages are filtered. These messages appear in the Program files\Exchsrvr\Mailroot\Vsi 1\Filter folder.

Cumulative Patch Information

To resolve this problem, obtain the March 2003 Exchange 2000 Server Post-Service Pack 3 (SP3) Rollup. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

Hotfix Information

A supported hotfix is 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.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, submit a request to Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if 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. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language. Component: Filtering

The English version of this fix has the file attributes (or later) 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 tool in Control Panel.
NOTE: Because of file dependencies, this update requires Microsoft Exchange 2000 Server Service Pack 3 (SP3). For additional information, click the article number below to view the article in the Microsoft Knowledge Base:

Microsoft has confirmed that this is a problem in Microsoft Exchange 2000 Server.