Using the Internet Explorer Unsafe File List to Filter E-mail Attachments 
To use the Internet Explorer unsafe file list to filter e-mail attachments: Start Outlook Express, and then on the Tools menu, click Options . 
  
Click the Security tab, and then click to select the Do not allow attachments to be saved or opened that could potentially be a virus check box under Virus Protection . 
This option does not enabled by default. If you enable this option, Outlook Express uses the Internet Explorer 6 unsafe file list and the Confirm open after download setting in Folder Options to determine whether a file is safe. Any e-mail attachment with a file type reported as "unsafe" is blocked from being downloaded. 
NOTE : The Internet Explorer 6 unsafe file list includes any file types that may have script or code associated with them. To add additional file types to be blocked or remove file types that should not be blocked: 
Click Start , point to Settings (or click Control Panel ), and then click Control Panel (or switch to Classic View or View All Control Panel Options ). 
  
Double-click Folder Options . 
  
On the File Types tab, click to select the file type that you want to block or allow, and then click Advanced . If the file type you want to add is not listed, perform the following steps: 
 
Click New . 
In the Create New Extension dialog box, type the file extension you want to add to the unsafe file list.  (see File Extension table below) 
Click OK , and then click Advanced . 
  
Click to place a check mark (block) or remove the check mark (allow) from the Confirm open after download checkbox. 
NOTE : You cannot remove the check from Confirm open after download to allow some file types. For example, .exe files are in the default unsafe file list in Internet Explorer and cannot be allowed. 
At very least you should add the 15 bold items below, to your list created in step 3 b above, as these are the most common virus related file extensions.    If you have the time you should add all of the file types given in this list. 
File Extension
 File type
 
.ade
 Microsoft Access project extension
 
.adp
 Microsoft Access project
 
.bas
 Microsoft Visual Basic class module
 
.bat
 Batch file
 
.chm
 Compiled HTML Help file
 
.cmd
 Microsoft Windows NT Command Script
 
.com
 Microsoft MS-DOS program
 
.cpl
 Control Panel extension
 
.crt
 Security certificate
 
.exe
 Program
 
.hlp
 Help file
 
.hta
 HTML program 
 
.inf
 Setup  Information
 
.ins
 Internet Naming Service
 
.isp
 Internet Communication settings
 
.js
 JScript file
 
.jse
 Jscript Encoded Script file
 
.lnk
 Shortcut
 
.mda
 Microsoft Access add-in program
 
.mdb
 Microsoft Access program
 
.mde
 Microsoft Access MDE database
 
.mdz
 Microsoft Access wizard program
 
.msc
 Microsoft Common Console Document
 
.msi
 Microsoft Windows Installer package
 
.msp
 Windows Installer patch
 
.mst
 Visual Test source files
 
.pcd
 Photo CD image or Microsoft Visual Test compiled script
 
.pif
 Shortcut to MS-DOS program
 
.reg
 Registration entries
 
.scr
 Screen saver
 
.sct
 Windows Script Component
 
.shs
 Shell Scrap Object
 
.url
 Internet shortcut
 
.vb
 VBScript file
 
.vbe
 VBScript Encoded Script file
 
.vbs
 VBScript file
 
.wsc
 Windows Script Component
 
.wsf
 Windows Script file
 
.wsh
 Windows Script Host Settings file
 
 
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