Types of Attachment Files Blocked by Microsoft Outlook
Microsoft Outlook Blocked Attachment Files
There are a number of attachment files types that Outlook blocks by default because of security reasons. Yes, Microsoft Outlook blocks these file types by default because these files have much potential for introducing a Virus in your system due to which the chances of corruption may be increased. And one more thing is that you can’t unblock these files. But, if you are using Exchange server then you can easily unblock these file types. If you’re facing any other Outlook issues, such as persistent reminders. so, this guide will help you How to Fix the Issues of Reminders Keep Popping up.
.ade – Access Project Extension (Microsoft).adp – Access Project (Microsoft).app – Executable Application
.asp – Active Server Page
.bas – BASIC Source Code
.bat– Batch Processing
.cer– Internet Security Certificate File
.chm – Compiled HTML Help
.cmd– DOS CP/M Command File, Command File for Windows NT
.cnt– Help File Index
.com– Command
.cpl– Windows Control Panel Extension (Microsoft)
.crt– Certificate File
.csh – csh Script
.der– DER Encoded X509 Certificate File
.exe – Executable File
.fxp – FoxPro Compiled Source (Microsoft)
.gadget – Windows Vista Gadget
.hlp – Windows Help File
.hpj– Project file used to create Windows Help File
.hta – Hypertext Application
.inf– Information or Setup File
.ins – IIS Internet Communication Settings (Microsoft)
.isp – IIS Internet Service Provider Settings (Microsoft)
.its – Internet Document Set, Internet Translation
.js – JavaScript Source Code
.jse – JScript Encoded Script File
.ksh – UNIX Shell Script
.lnk – Windows Shortcut File
.mad – Access Module Shortcut (Microsoft)
.maf – Access (Microsoft)
.maq – Access Diagram Shortcut (Microsoft)
.mam– Access Macro Shortcut (Microsoft)
.maq– Access Query Shortcut (Microsoft)
.mar – Access Report Shortcut (Microsoft)
.mas – Access Stored Procedure (Microsoft)
.mat – Access Table Shortcut (Microsoft)
.mau – Media Attachment Unit
.mav – Access View Shortcut (Microsoft)
.maw– Access Data Access Page (Microsoft)
.mda – Access Add-in (Microsoft), MDA Access 2 Workgroup (Microsoft)
.mdb – Access Application (Microsoft), MDF Access Database (Microsoft)
.mde – Access MDE Database File (Microsoft)
.mdt – Access ADD-in Data (Microsoft)
.mdw – Access Workgroup Information (Microsoft)
.mdz – Access Wizard Template (Microsoft)
.msc– Microsoft Management Console Snap-in Control File (Microsoft)
.msh – Microsoft Shell
.msh1 – Microsoft Shell
.msh2 – Microsoft Shell
.msh1xml– Microsoft Shell
.msh2xml– Microsoft Shell
.msi – Windows Installer File (Microsoft)
.msp – Windows Installer Update
.mst – Windows SDK Setup Transform Script
.ops– Office Profile Setting File
.osd – Application Virtualized with Microsoft SoftGrid Sequencer
.pcd – Visual Test (Microsoft)
.pif – Windows Program Information File (Microsoft)
.plg– Developer Studio Build Log
.prf– Windows System File
.prg – Program File
.pst– MS Exchange Address Book File, Outlook Personal Folder File (Microsoft)
.reg – Registration Information/ Key for W95/98, Registry Data File
.scf– Windows Explorer Command
.scr– Windows Screen Saver
.sct – Windows Script Component, Foxpro Screen (Microsoft)
.shb– Windows Shortcut into a Document
.shs – Shell Scrap Object File
.ps1– Windows PowerShell
.ps1xml– Windows PowerShell
.ps2 – Windows PowerShell
.ps2xml – Windows PowerShell
.psc1 – Windows PowerShell
.psc2– Windows PowerShell
.tmp – Temporary File/Folder
.url– Internal Location
.vb– VBScript File or Any VisualBasic Source
.vbe– VBScript Encoded Script File
.vbp– Visual Basic Project File
.vbs– VBScript Script File, Visual Basic for Application Script
.vsmacros– Visual Studio .NET Binary-based Macro Project (Microsoft)
.vsw – Visio Workspace File (Microsoft)
.ws – Windows Script File
.wsf– Windows Script File
.wsh – Windows Script Host Setting File
.xnk – Exchange Public Folder Shortcut
Conclusion
Microsoft Outlook blocks certain attachment files to enhance security and prevent attacks. While this is helpful, it can be frustrating when legitimate files are blocked. To manage blocked attachments, you can rename the file extensions or compress them. Just make sure the source is trusted before bypassing Outlook’s security.