Browse file extensions by file type category:
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
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.
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![]() | Program executable |
file extension lnk | Windows Shortcut |
![]() | Temporary data |
![]() | Email message |
Microsoft Access database | |
![]() | MS Windows screensaver |
Microsoft Windows Installer installation package | |
![]() | Active Server Page script page |
![]() | Basic source code |
![]() | JavaScript source code script |
![]() | Command executable |
![]() | Mac application package or core system service |
![]() | Batch file (executable) |
![]() | Visual Basic script |
Microsoft Access compiled database (application) | |
![]() | Visual FoxPro compiled database |
![]() | Windows registry data |
![]() | Windows installation script |
![]() | Windows Installer transform script |
Windows sidebar gadget | |
![]() | Microsoft Windows script |
![]() | Internet Shortcut - URL - Uniform Resource Locator |
file extension prg | Program source data |
Microsoft Access table shortcut | |
![]() | Help Contents data |
![]() | Internet security certificate |
![]() | HTML program |
![]() | Microsoft Windows Shell Scrap Object |
![]() | Microsoft Windows command script |
![]() | Microsoft Visio smartshapes data |
file extension ops | Microsoft Office profile settings |
Microsoft Access database template | |
![]() | Microsoft compiled HTML help module |
![]() | Corel WordPerfect Mail address book |
![]() | Microsoft Windows program information |
![]() | Microsoft Windows script component |
Microsoft Access project | |
![]() | DER encoded internet security certificate |
![]() | Microsoft management console control data |
![]() | Visual Basic encoded script |
Microsoft Access compiled project | |
file extension isp | Internet Service Provider settings |
file extension plg | Microsoft Developer Studio build log |
![]() | Windows PowerShell cmdlet script |
![]() | JScript encoded script |
![]() | Windows Installer patch |
![]() | Windows Explorer shell command file |
file extension prg | Program |
![]() | Microsoft Visual Basic project |
Microsoft Access report shortcut | |
![]() | Help file |
![]() | Microsoft Visual Studio Visual Basic script |
Microsoft Access stored procedures data | |
Microsoft Access workgroup information | |
Microsoft Access add-in | |
![]() | Microsoft Visio flowchart |
![]() | Windows Script |
Microsoft Access macro shortcut | |
file extension ps2 | Microsoft Windows Shell script |
![]() | Internet security certificate |
file extension ksh | Unix shell script |
Microsoft Access form shortcut | |
![]() | Microsoft Windows scripting component |
file extension xnk | Microsoft Exchange shortcut |
Microsoft Access view data | |
Microsoft Access module shortcut | |
![]() | Microsoft Windows shortcut into a document |
![]() | Microsoft Windows Internet Naming Service |
Microsoft Access query shortcut | |
![]() | Microsoft Windows Scripting Host data |
file extension csh | csh script |
![]() | Microsoft Windows PowerShell console data |
file extension mau | Media Attachment Unit data |
Microsoft Access wizard template | |
![]() | Microsoft Visual Studio binary-based macro project |
![]() | Microsoft Win Help project |
![]() | Microsoft Office Visio 2010 web drawing |
Microsoft Access data access page | |
file extension msh1xml | Windows Power Shell script |
file extension ps1xml | Microsoft Windows PowerShell display configuration |
file extension app | Symbian OS application |
file extension msh2xml | Windows PowerShell script |
file extension psc2 | Microsoft Windows PowerShell script |
file extension ps2xml | Windows PowerShell data |
Microsoft Access diagram shortcut | |
![]() | Internet document |
file extension msh | Microsoft Shell script |
file extension mshxml | Microsoft XML typedata |
Microsoft Visual Test data | |
file extension app | ThecusOS application |
file extension msh2 | Microsoft Shell script |
file extension msh1 | Microsoft Shell script |
![]() | Microsoft Profiler output |
file extension osd | SoftGrid program description |
file extension ins | Microsoft IIS Internet communications settings |