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.
Sort by: Extension | Sort by: File type description |
file extension asp | Active Server Page script page |
file extension bas | Basic source code |
file extension bat | Batch file (executable) |
file extension com | Command executable |
file extension abx | Corel WordPerfect Mail address book |
file extension csh | csh script |
file extension der | DER encoded internet security certificate |
file extension eml | Email message |
file extension cnt | Help Contents data |
file extension hlp | Help file |
file extension hta | HTML program |
file extension its | Internet document |
file extension crt | Internet security certificate |
file extension cer | Internet security certificate |
file extension isp | Internet Service Provider settings |
file extension url | Internet Shortcut - URL - Uniform Resource Locator |
file extension js | JavaScript source code script |
file extension jse | JScript encoded script |
file extension app | Mac application package or core system service |
file extension mau | Media Attachment Unit data |
file extension mda | Microsoft Access add-in |
file extension mde | Microsoft Access compiled database (application) |
file extension ade | Microsoft Access compiled project |
file extension maw | Microsoft Access data access page |
file extension mdb | Microsoft Access database |
file extension mdt | Microsoft Access database template |
file extension mag | Microsoft Access diagram shortcut |
file extension maf | Microsoft Access form shortcut |
file extension mam | Microsoft Access macro shortcut |
file extension mad | Microsoft Access module shortcut |
file extension adp | Microsoft Access project |
file extension maq | Microsoft Access query shortcut |
file extension mar | Microsoft Access report shortcut |
file extension mas | Microsoft Access stored procedures data |
file extension mat | Microsoft Access table shortcut |
file extension mav | Microsoft Access view data |
file extension mdz | Microsoft Access wizard template |
file extension mdw | Microsoft Access workgroup information |
file extension chm | Microsoft compiled HTML help module |
file extension plg | Microsoft Developer Studio build log |
file extension xnk | Microsoft Exchange shortcut |
file extension ins | Microsoft IIS Internet communications settings |
file extension msc | Microsoft management console control data |
file extension ops | Microsoft Office profile settings |
file extension vsw | Microsoft Office Visio 2010 web drawing |
file extension prf | Microsoft Profiler output |
file extension msh | Microsoft Shell script |
file extension msh1 | Microsoft Shell script |
file extension msh2 | Microsoft Shell script |
file extension vst | Microsoft Visio flowchart |
file extension vss | Microsoft Visio smartshapes data |
file extension vbp | Microsoft Visual Basic project |
file extension vsmacros | Microsoft Visual Studio binary-based macro project |
file extension vb | Microsoft Visual Studio Visual Basic script |
file extension pcd | Microsoft Visual Test data |
file extension hpj | Microsoft Win Help project |
file extension cmd | Microsoft Windows command script |
file extension msi | Microsoft Windows Installer installation package |
file extension ins | Microsoft Windows Internet Naming Service |
file extension psc1 | Microsoft Windows PowerShell console data |
file extension ps1xml | Microsoft Windows PowerShell display configuration |
file extension psc2 | Microsoft Windows PowerShell script |
file extension pif | Microsoft Windows program information |
file extension ws | Microsoft Windows script |
file extension sct | Microsoft Windows script component |
file extension wsc | Microsoft Windows scripting component |
file extension wsh | Microsoft Windows Scripting Host data |
file extension shs | Microsoft Windows Shell Scrap Object |
file extension ps2 | Microsoft Windows Shell script |
file extension shb | Microsoft Windows shortcut into a document |
file extension mshxml | Microsoft XML typedata |
file extension scr | MS Windows screensaver |
file extension prg | Program |
file extension exe | Program executable |
file extension prg | Program source data |
file extension osd | SoftGrid program description |
file extension app | Symbian OS application |
file extension tmp | Temporary data |
file extension app | ThecusOS application |
file extension ksh | Unix shell script |
file extension vbe | Visual Basic encoded script |
file extension vbs | Visual Basic script |
file extension fxp | Visual FoxPro compiled database |
file extension scf | Windows Explorer shell command file |
file extension inf | Windows installation script |
file extension msp | Windows Installer patch |
file extension mst | Windows Installer transform script |
file extension msh1xml | Windows Power Shell script |
file extension ps1 | Windows PowerShell cmdlet script |
file extension ps2xml | Windows PowerShell data |
file extension msh2xml | Windows PowerShell script |
file extension reg | Windows registry data |
file extension wsf | Windows Script |
file extension lnk | Windows Shortcut |
file extension gadget | Windows sidebar gadget |