The following list was posted by Microsoft at Support.microsoft.com.
According to Microsoft, "The following list contains attachments that are considered unsafe:" for Microsoft based PCs, in addition to being able to distribute Viruses, these files types can contain destructive payloads and therefore are not permitted on SPAM Zapper filtered Email systems by default. While you are able to override the default settings, these file types are excluded, as they are the easiest for Hackers and Malware Writers to distribute their payloads with. These are some of the reasons we filter these unsafe file extensions from our Email.
We offer a GUI based selection tool on our SpamZapper our on-line customers to permit them to recieve these file types in the future. However, all default properties filter these file types as guidelines from Microsoft as a starting point. While this is a Guideline list of file types, we have included additional file types in our SpamZapper filtering abilities.
These files have been identified as one of the major vulnerabilites of MicroSoft Outlook, and this Email Reader's preloading of email messages. While our SpamZapper filtering easily removes these attachments from infecting your PC, we also recommend the use of Thunderbird Email Reader, or other email readers.
File Type |
Description |
| ADE | Microsoft Access project extension |
| ADP | Microsoft Access project |
| ASX | Windows Media Audio / Video |
| BAS | Microsoft Visual Basic class module |
| BAT | Batch file |
| CHM | Compiled HTML Help file |
| CMD | Microsoft Windows NT Command script |
| COM | Microsoft MS-DOS program |
| CPL | Control Panel extension |
| CRT | Security certificate |
| EXE | Program |
| HLP | Help file |
| HTA | HTML program |
| INF | Setup Information |
| INS | Internet Naming Service |
| ISP | Internet Communication settings |
| JS | JScript File |
| JSE | JScript Encoded Script file |
| LNK | Shortcut |
| MDA | Microsoft Access add-in program |
| MDB | Microsoft Access program |
| MDE | Microsoft Access MDE database |
| MDT | Microsoft Access workgroup information |
| MDW | Microsoft Access workgroup information |
| MDZ | Microsoft Access wizard program |
| MSC | Microsoft Common Console document |
| MSI | Microsoft Windows Installer package |
| MSP | Microsoft Windows Installer patch |
| MST | Microsoft Windows Installer transform, Microsoft Visual Test source file |
| OPS | Office XP settings |
| PCD | Photo CD Image, Microsoft Visual compiled script |
| PIF | Shortcut to MS-DOS program |
| PRF | Microsoft Outlook profile settings |
| REG | Registration entries |
| SCF | Windows Explorer command |
| SCR | Screen saver |
| SCT | Windows Script Component |
| SHB | Shell Scrap object |
| SHS | Shell Scrap object |
| URL | Internet shortcut |
| VB | VBScript file |
| VBE | VBScript Encoded script file |
| VBS | VBScript file |
| WSC | Windows Script Component |
| WSF | Windows Script file |
| WSH | Windows Scripting Host Settings file |
The SPAM Zapper implements these file types as Bad Extensions by default. You can modify our filtering rules for the Domain, or specific users with the SpamZapper Configuration tool.