Blocked attachments in Outlook

Modified on: 2017-07-20 15:49:13 -0400

Blocked attachments in Outlook

To help protect your computer, Microsoft Outlook 2010 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.

Share your files safely

If you want to receive a file of a type that is blocked by Outlook, you can ask the sender to either make the file accessible without using Outlook, or make it less likely to be blocked by Outlook. Following are a few safe ways to share files with people you trust.

Use a file compression utility. Using a compression utility, such as WinZip or the utility built into Windows (right-click on a file and choose send to compressed folder), creates a compressed archive file that has a different file name extension. Outlook does not recognize these file name extensions as potential threats. Therefore, it does not block the new attachment.

Rename the file. You can request that the sender rename the attachment to use a file name extension that Outlook does not recognize as a threat. For example, an executable file that has the file name extension .exe could be renamed as a Word 2010 file that has a .docx file name extension.

Use a shared server. You might want to ask the sender to save the attachment to a server or an FTP site that you can access. This can include a secure network share server such as SharePoint. The sender can send you a link to the attachment on the server or FTP site. You can click the link to access the file and save it on your computer.

Ask the sender to resend the renamed attachment to you. To save the attachment and rename it to use the original file name extension, do the following:

Locate the attachment in the email message.

Right-click the attachment, and then click Copy.

Right-click the desktop, and then click Paste.

Right-click the pasted file, and then click Rename.

Rename the file to use the original file name extension, such as .exe.

Attachment file types blocked in Outlook

File name extension

                File type
Access Project Extension (Microsoft)
Access Project (Microsoft)
Executable Application
Active Server Page
BASIC Source Code
Batch Processing
Internet Security Certificate File
Compiled HTML Help
DOS CP/M Command File, Command File for Windows NT
Windows Control Panel Extension (Microsoft)
Certificate File
csh Script
DER Encoded X509 Certificate File
Executable File
FoxPro Compiled Source (Microsoft)
Windows Vista gadget
Windows Help File
Hypertext Application
Information or Setup File
IIS Internet Communications Settings (Microsoft)
IIS Internet Service Provider Settings (Microsoft)
Internet Document Set, Internet Translation
JavaScript Source Code
JScript Encoded Script File
UNIX Shell Script
Windows Shortcut File
Access Module Shortcut (Microsoft)
Access (Microsoft)
Access Diagram Shortcut (Microsoft)
Access Macro Shortcut (Microsoft)
Access Query Shortcut (Microsoft)
Access Report Shortcut (Microsoft)
Access Stored Procedures (Microsoft)
Access Table Shortcut (Microsoft)
Media Attachment Unit
Access View Shortcut (Microsoft)
Access Data Access Page (Microsoft)
Access Add-in (Microsoft), MDA Access 2 Workgroup (Microsoft)
Access Application (Microsoft), MDB Access Database (Microsoft)
Access MDE Database File (Microsoft)
Access Add-in Data (Microsoft)
Access Workgroup Information (Microsoft)
Access Wizard Template (Microsoft)
Microsoft Management Console Snap-in Control File (Microsoft)
Microsoft Shell
Microsoft Shell
Microsoft Shell
Microsoft Shell
Microsoft Shell
Microsoft Shell
Windows Installer File (Microsoft)
Windows Installer Update
Windows SDK Setup Transform Script
Office Profile Settings File
Visual Test (Microsoft)
Windows Program Information File (Microsoft)
Developer Studio Build Log
Windows System File
Program File
MS Exchange Address Book File, Outlook Personal Folder File (Microsoft)
Registration Information/Key for W95/98, Registry Data File
Windows Explorer Command
Windows Screen Saver
Windows Script Component, Foxpro Screen (Microsoft)
Windows Shortcut into a Document
Shell Scrap Object File
Windows PowerShell
Windows PowerShell
Windows PowerShell
Windows PowerShell
Windows PowerShell
Windows PowerShell
Temporary File/Folder
Internet Location
VBScript File or Any Visual Basic Source
VBScript Encoded Script File
VBScript Script File, Visual Basic for Applications Script
Visual Studio .NET Binary-based Macro Project (Microsoft)
Visio Workspace File (Microsoft)
Windows Script File
Windows Script Component
Windows Script File
Windows Script Host Settings File
Exchange Public Folder Shortcut

Did you find it helpful? Yes No

Send feedback
Sorry we couldn't be helpful. Help us improve this article with your feedback.