File Types Impacted by the Outlook 98/2000 E-mail Security Update

Since the following file types — listed by file extension — can execute malicious code, they are disabled in e-mail messages if the Outlook® 98/2000 E-mail Security Update is installed. As a protection from potential viruses, users are restricted from accessing these attachments from within Outlook. Users that would like to distribute the attachments on this list can post them to file shares, intranets, online hard drives, community Web sites such as MSN Online File Cabinets.

Note For information about adding file types to the list below, read Add a File Type to the Outlook 98/2000 E-mail Security List.

File Extension	Description
ADE	Microsoft Access Project Extension
ADP	Microsoft Access Project
BAS	Visual Basic® Class Module
BAT	Batch File
CHM	Compiled HTML Help File
CMD	Windows NT® Command Script
COM	MS-DOS® Application
CPL	Control Panel Extension
CRT	Security Certificate
EXE	Application
HLP	Windows® Help File
HTA	HTML Applications
INF	Setup Information File
INS	Internet Communication Settings
ISP	Internet Communication Settings
JS	JScript® File
JSE	JScript Encoded Script File
LNK	Shortcut
MDB	Microsoft Access Application
MDE	Microsoft Access MDE Database
MSC	Microsoft Common Console Document
MSI	Windows Installer Package
MSP	Windows Installer Patch
MST	Visual Test Source File
PCD	Photo CD Image
PIF	Shortcut to MS-DOS Program
REG	Registration Entries
SCR	Screen Saver
SCT	Windows Script Component
SHS	Shell Scrap Object
URL	Internet Shortcut (Uniform Resource Locator)
VB	VBScript File
VBE	VBScript Encoded Script File
VBS	VBScript Script File
WSC	Windows Script Component
WSF	Windows Script File
WSH	Windows Scripting Host Settings File

Table of Contents

File Types Impacted by the Outlook 98/2000 E-mail Security Update