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Unblock blocked-attachment in MS Outlook

July 29, 2008

1. Exit Outlook if it is running.
2. Start Regedit
3. Go to HKEY_CURRENT_USER\Software\Microsoft\Office\11\Outlook\Security
4. Create a new string value called Level1Remove
5. Enter in the file extensions you want to use, such as .exe or .bat
6. You can have multiple file types separated by a semicolon
7. .exe;.com

The following are a list of the file attachments that are restricted by default
.ade            Microsoft Access project extension
.adp            Microsoft Access project
.asx            Windows Media Audio / Video
.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
.mdb            Microsoft Access program
.mde            Microsoft Access MDE database
.msc            Microsoft Common Console document
.msi            Microsoft Windows Installer package
.msp            Microsoft Windows Installer patch
.mst            Microsoft Windows Installer transform; Microsoft Visual Test source file
.pcd            Photo CD image; Microsoft Visual compiled script
.pif            Shortcut to MS-DOS program
.prf            Microsoft Outlook profile settings
.reg            Registration entries
.scf            Windows Explorer command
.scr            Screen saver
.sct            Windows Script Component
.shb            Shell Scrap object
.shs            Shell Scrap object
.url            Internet shortcut
.vbs           Visual Basic Script

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