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Email attachment blocked file icon Email attachment blocked file type extensions
(95 file extension database entries)

Group of file extensions and file types blocked by email clients such as Microsoft Outlook in email message attachments, in attempt to stop viruses and malicious software spreading through internet via email

List of common file extensions blocked by mail clients

Email attachment blocked file extension list

Group of file extensions and file types blocked by email clients such as Microsoft Outlook in email message attachments, in attempt to stop viruses and malicious software spreading through internet via email.

To help protect your computer, Microsoft Outlook does not allow you to receive files of certain types (such as .exe files) as attachments, because of their potential for introducing a virus into your computer. Outlook blocks these files by default.

Attachment file types blocked by Microsoft Outlook: There are two levels of attachment security. Access to Level 1 files is blocked and can't be changed. When you receive an attachment with a Level 2 file type, you will be prompted to save the file to your hard disk. If you use Microsoft Exchange Server, your system administrator can add or remove file types for both levels of e-mail security. If a file type is added to both levels, it will be treated as a Level 1 file type.

Sort by: ExtensionSort by: File type description
eml file icon file extension emlEmail message
exe file icon file extension exeProgram executable
mdb file icon file extension mdbMicrosoft Access database
tmp file icon file extension tmpTemporary data
 file extension lnkWindows Shortcut
asp file icon file extension aspActive Server Page script page
js file icon file extension jsJavaScript source code script
msi file icon file extension msiMicrosoft Windows Installer installation package
scr file icon file extension scrMS Windows screensaver
bas file icon file extension basBasic source code
gadget file icon file extension gadgetWindows sidebar gadget
ws file icon file extension wsMicrosoft Windows script
inf file icon file extension infWindows installation script
fxp file icon file extension fxpVisual FoxPro compiled database
mst file icon file extension mstWindows Installer transform script
mde file icon file extension mdeMicrosoft Access compiled database (application)
app file icon file extension appMac application package or core system service
com file icon file extension comCommand executable
bat file icon file extension batBatch file (executable)
 file extension prgProgram source data
hta file icon file extension htaHTML program
chm file icon file extension chmMicrosoft compiled HTML help module
vss file icon file extension vssMicrosoft Visio smartshapes data
mdt file icon file extension mdtMicrosoft Access database template
cnt file icon file extension cntHelp Contents data
reg file icon file extension regWindows registry data
 file extension opsMicrosoft Office profile settings
shs file icon file extension shsMicrosoft Windows Shell Scrap Object
jse file icon file extension jseJScript encoded script
ade file icon file extension adeMicrosoft Access compiled project
abx file icon file extension abxCorel WordPerfect Mail address book
cmd file icon file extension cmdMicrosoft Windows command script
sct file icon file extension sctMicrosoft Windows script component
adp file icon file extension adpMicrosoft Access project
crt file icon file extension crtInternet security certificate
vbs file icon file extension vbsVisual Basic script
pif file icon file extension pifMicrosoft Windows program information
scf file icon file extension scfWindows Explorer shell command file
mat file icon file extension matMicrosoft Access table shortcut file
vbe file icon file extension vbeVisual Basic encoded script
hlp file icon file extension hlpHelp file
msc file icon file extension mscMicrosoft management console control file
mdw file icon file extension mdwMicrosoft Access workgroup information
mar file icon file extension marMicrosoft Access report shortcut
vb file icon file extension vbMicrosoft Visual Studio Visual Basic script
url file icon file extension urlInternet Shortcut - URL - Uniform Resource Locator
maf file icon file extension mafMicrosoft Access form shortcut
msp file icon file extension mspWindows Installer patch
 file extension plgMicrosoft Developer Studio build log
vbp file icon file extension vbpMicrosoft Visual Basic project
mav file icon file extension mavMicrosoft Access view data
vst file icon file extension vstMicrosoft Visio flowchart
 file extension ispInternet Service Provider settings
der file icon file extension derDER encoded internet security certificate
mas file icon file extension masMicrosoft Access stored procedures data
mda file icon file extension mdaMicrosoft Access add-in
ps1 file icon file extension ps1Windows PowerShell cmdlet script
wsf file icon file extension wsfWindows Script file
 file extension kshUnix shell script
 file extension xnkMicrosoft Exchange shortcut file
mam file icon file extension mamMicrosoft Access macro shortcut
 file extension prgProgram
wsc file icon file extension wscMicrosoft Windows scripting component
mad file icon file extension madMicrosoft Access module shortcut
shb file icon file extension shbMicrosoft Windows shortcut into a document
 file extension mauMedia Attachment Unit data
cer file icon file extension cerInternet security certificate
vsw file icon file extension vswMicrosoft Office Visio 2010 web drawing file
hpj file icon file extension hpjMicrosoft Win Help project file
wsh file icon file extension wshMicrosoft Windows Scripting Host file
vsmacros file icon file extension vsmacrosMicrosoft Visual Studio binary-based macro project
maq file icon file extension maqMicrosoft Access query shortcut
 file extension cshcsh script
 file extension ps2Microsoft Windows Shell script
mdz file icon file extension mdzMicrosoft Access wizard template
maw file icon file extension mawMicrosoft Access data access page file
psc1 file icon file extension psc1Microsoft Windows PowerShell console file
 file extension ps2xmlWindows PowerShell file
its file icon file extension itsInternet document file
 file extension ps1xmlMicrosoft Windows PowerShell display configuration file
 file extension appSymbian OS application file
 file extension mshxmlMicrosoft XML typedata file
 file extension mshMicrosoft Shell script file
 file extension msh1xmlWindows Power Shell script file
 file extension psc2Microsoft Windows PowerShell script file
ins file icon file extension insMicrosoft Windows Internet Naming Service
prf file icon file extension prfMicrosoft Profiler output
pcd file icon file extension pcdMicrosoft Visual Test file
 file extension msh2xmlWindows PowerShell script file
mag file icon file extension magMicrosoft Access diagram shortcut file
 file extension msh1Microsoft Shell script file
 file extension appThecusOS application file
 file extension osdSoftGrid program description
 file extension msh2Microsoft Shell script file
 file extension insMicrosoft IIS Internet communications settings file


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