Outlook 2013 – List of blocked attachments

The list below details the attachments that are blocked by default by Outlook 2013.Outlook2013

To unblock the attachments, see Outlook 2013 – How to unblock ‘potentially unsafe’ attachments


File extensionFile type
adeAccess Project Extension (Microsoft)
adpAccess Project (Microsoft)
appExecutable Application
aspActive Server Page
basBASIC Source Code
batBatch Processing
cerInternet Security Certificate File
chmCompiled HTML Help
cmdDOS CP/M Command File, Command File for Windows NT
cplWindows Control Panel Extension (Microsoft)
crtCertificate File
cshcsh Script
exeExecutable File
fxpFoxPro Compiled Source (Microsoft)
gadgetWindows Vista gadget
hlpWindows Help File
htaHypertext Application
infInformation or Setup File
insIIS Internet Communications Settings (Microsoft)
ispIIS Internet Service Provider Settings (Microsoft)
itsInternet Document Set, Internet Translation
jsJavaScript Source Code
jseJScript Encoded Script File
kshUNIX Shell Script
lnkWindows Shortcut File
madAccess Module Shortcut (Microsoft)
mafAccess (Microsoft)
magAccess Diagram Shortcut (Microsoft)
mamAccess Macro Shortcut (Microsoft)
maqAccess Query Shortcut (Microsoft)
marAccess Report Shortcut (Microsoft)
masAccess Stored Procedures (Microsoft)
matAccess Table Shortcut (Microsoft)
mavAccess View Shortcut (Microsoft)
mawAccess Data Access Page (Microsoft)
mdaAccess Add-in (Microsoft), MDA Access 2 Workgroup (Microsoft)
mdbAccess Application (Microsoft), MDB Access Database (Microsoft)
mdeAccess MDE Database File (Microsoft)
mdtAccess Add-in Data (Microsoft)
mdwAccess Workgroup Information (Microsoft)
mdzAccess Wizard Template (Microsoft)
mscMicrosoft Management Console Snap-in Control File (Microsoft)
msiWindows Installer File (Microsoft)
mspWindows Installer Patch
mstWindows SDK Setup Transform Script
opsOffice Profile Settings File
pcdVisual Test (Microsoft)
pifWindows Program Information File (Microsoft)
prfWindows System File
prgProgram File
pstMS Exchange Address Book File, Outlook Personal Folder File (Microsoft)
regRegistration Information/Key for W95/98, Registry Data File
scfWindows Explorer Command
scrWindows Screen Saver
sctWindows Script Component, Foxpro Screen (Microsoft)
shbWindows Shortcut into a Document
shsShell Scrap Object File
tmpTemporary File/Folder
urlInternet Location
vbVBScript File or Any VisualBasic Source
vbeVBScript Encoded Script File
vbsVBScript Script File, Visual Basic for Applications Script
vsmacrosVisual Studio .NET Binary-based Macro Project (Microsoft)
vssVisio Stencil (Microsoft)
vstVisio Template (Microsoft)
vswVisio Workspace File (Microsoft)
wsWindows Script File
wscWindows Script Component
wsfWindows Script File
wshWindows Script Host Settings File

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