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List of common email attachment blocked file extensions

Check out list of files that are typically blocked as attachments in e-mail clients to protect the end recipient.

Common file extensions blocked by mail clients may change in time as the popularity and significance of some formats can change.
Whole category of file extensions blocked by mail clients contains now 95 file types. Show all email attachment blocked file types.

app file icon app 

An app file extension is related to Mac OS X (macOS) operating system for Apple Mac Pro, MacBook Pro, Mac Mini and MacBook Air computers. An app file contains application package.

asp file icon asp 

An asp file extension is associated with the ASP Classic server side scripting engine used to dynamically generate web pages. An asp file contains Microsoft Active Server Page source code scripts. The ASP Classic is obsolete and it was replaced by ASP.NET.

bat file icon bat 

Files with bat suffix can be commonly found as so called batch files. These text files are small scripts that contain a sequence of commands for a computer operating system.

chm file icon chm 

A chm file extension is related to Microsoft compiled HTML help file format. CHM is acronym for Compiled Help Modules.

cnt file icon cnt 

A cnt file extension is related to the Help Contents files used by Microsoft Windows Help.

com file icon com 

Files with com extension can be generally found as command files. It is a type of program executable file format associated with the MS-DOS operating system.

eml file icon eml 

An eml file extension is used by variety e-mail clients, such as Outlook Express, Windows Mail, Windows Live Mail, Thunderbird etc. An eml file contains saved email message either meant as backup or for sharing.

exe file icon exe 

An exe file extension is traditionally used for main executable files since the times of MS-DOS. It was adopted for executables in Windows as well. Executables are files that launch programs.

gadget file icon gadget 

A gadget file extension is used for Windows Gadgets, small programs that enhance the desktop with various features. Gadgets are usually located in the Windows Sidebar, on the right side of desktop.

inf file icon inf 

Files with inf suffix can be generally found as various installation scripts in Microsoft Windows operating system.

js file icon js 

Files with js file extension can b commonly found as JavaScripts. Used to execute scripts on internet pages and such.

 lnk 

An lnk file extension is used for files that represent Windows shortcut to a program installed on computer. Every time you create a shortcut a new lnk file is created that acts as the actual link, that can be further customized with various settings as launch parameters, icon etc. Most lnk files are located on user's desktop.

mdb file icon mdb 

An mdb file extension is used by Microsoft Access database management system for its main database files. MDB format was replaced in later version of Microsoft Office by ACCDB format. Access mdb databases can usually be opened in or imported to most database management systems, such as dBase, Oracle etc.

msi file icon msi 

An msi file extension is commonly used for Microsoft Installation packages used by most Windows based programs. If you open msi file in Windows, the installation procedure will commence.

 prg 

A prg file extension is default file extension used by operating systems and development environments for program executable files.

reg file icon reg 

Files with reg suffix can be usually found as Windows registry files, special files that contain exported registry entries that can be uploaded to the system.

scr file icon scr 

A scr file extension is associated with screensavers created for Microsoft Windows operating system.

shs file icon shs 

Files with shs suffix are quite often found as special OLE objects (scraps) from various Windows / MS Office apps.

tmp file icon tmp 

A tmp file extension is traditionally used for temporary files in Microsoft Windows. In most cases can be safely deleted.

vbs file icon vbs 

Files with vbs suffix can be generally found as scripts made using Visual Basic programming language and development environment. Used in many programs.

This is a list of some the most common file types from this category and may change in time as the popularity and significance of some formats can change. Whole category of file extensions blocked by mail clients contains now 95 file types. Show all email attachment blocked files.

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