Blocking Email Attachments


One of the ways that Davidson protects our email system and individual mailboxes from malicious software is by blocking attachments that are commonly used to transmit viruses or malicious software.

Below are some of the common questions regarding blocked attachments within the Davidson email system:

What file types will be blocked?

Executable files including, .ace, .ani, .app, .docm, .exe, .jar, .reg, .scr, .vbe, and .vbs will be blocked. For a full list, please visit section on blocked file types.

How do I know an attachment has been blocked?

The Davidson user that is sending or receiving a blocked attachment receives an email notification that an attachment has been blocked.

What do I do if an attachment is being blocked?

In cases where a file is being blocked, we recommend that you leverage Google Drive to share these file types.  Google Drive allows users to easily share files with both users within and outside the Davidson community.

For help with sharing, please visit our KB article on Google Drive sharing.

Can you send a blocked file by replacing the file extension with an unblocked file extension?

No, the scanning software can detect the blocked filetypes, even when the file is renamed.


Blocked only if they contain blocked file types (see below)




Archive File (7-Zip)


Archive File (WinAce)


Archive File (Several)


Archive File (Gnu Zip)


Archive File (Roshal Archive, WinRAR and others)


Archive File (Stuffit)


Archive File (Unix Archive)


Archive File (Unix Archive)


Archive File (ZIP)


Blocked File Types





Access Project Extension (Microsoft)


Access Project (Microsoft)


Microsoft Animated Mouse Cursors


Executable Application


Active Server Page


BASIC Source Code


Batch Processing


Security file provided by a third party Certificate Authority


Compiled HTML Help


DOS CP/M Command File, Command File for Windows NT


Executable File


Windows Control Panel Extension (Microsoft)


Security Certificate


csh Script




Digital certificate file


Dynamic Link Library


Microsoft Word Open XML Macro-Enabled Document




Executable File


FoxPro Compiled Source (Microsoft)


Windows Vista gadget


Windows Help File


Hypertext Application


Information or Setup File


IIS Internet Service Provider Settings (Microsoft)


Internet Document Set, Internet Translation


Java Archive


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 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


Windows Installer File (Microsoft)


Windows Installer Update


Wavefront 3D Object File


Office Profile Settings File




Visual Test (Microsoft)


Windows Program Information File (Microsoft)


Developer Studio Build Log


Windows System File


Program File


Windows PowerShell


Windows PowerShell Display Configuration File


Windows PowerShell


Windows PowerShell Display Configuration File


Windows PowerShell


Windows PowerShell


MS Exchange Address Book File, Outlook Personal Folder File


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


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)


Virtual Device Driver




Windows Script File


Windows Script Component


Windows Script File


Windows Script Host Settings File


Exchange Public Folder Shortcut


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