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Important This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:
(https://support.microsoft.com/kb/256986/ )Description of the Microsoft Windows Registry
A problem that exists with the SMTP message screener may result in corrupt entries in the configuration of the SMTP filter on the Attachments or Keywords tab.
To locate this part of the user interface:
To prevent future corruption, install the hotfix that is referenced in the following article in the Microsoft Knowledge base:
(https://support.microsoft.com/kb/292014/ )Deleting disabled SMTP filter attachment rule leaves corrupted rule
To Remove Corrupt Entries on Registry-Based Computers
To Remove Corrupt Entries on Active Directory-Integrated InstallationsWarning If you use the ADSI Edit snap-in, the LDP utility, or any other LDAP version 3 client, and you incorrectly modify the attributes of Active Directory objects, you can cause serious problems. These problems may require you to reinstall Microsoft Windows 2000 Server, Microsoft Windows Server 2003, Microsoft Exchange 2000 Server, Microsoft Exchange Server 2003, or both Windows and Exchange. Microsoft cannot guarantee that problems that occur if you incorrectly modify Active Directory object attributes can be solved. Modify these attributes at your own risk. Note The Active Directory Service Interfaces (ADSI) Edit snap-in is included with the Microsoft Windows Support Tools. To install the Windows Support Tools in Microsoft Windows 2000, double-click the Setup.exe file in the Support\Tools folder on the Windows 2000 CD. To install the Windows Support Tools in Microsoft Windows Server 2003, double-click the Suptools.msi file in the Support\Tools folder on the Windows Server 2003 CD.