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Email attachment policy
Our email attachment policy prevents users from accessing several file types when sent as
e-mail attachments. Affected file types include executables, batch
files, and other file types that contain executable code often used
by malicious hackers to spread viruses and Trojan Horses.
All of the attachments that are banned are considered, in
simplistic form, programs. What this means is that by clicking on
them, (sometimes you don’t have to even do that,) they will take
some kind of action. That action could be as simple as popping up a cartoon on your
desktop, to sending all the data in your computer to a different
computer or reformatting your hard drive.
Here is the list of banned attachments by their file extension:
| File Extension |
Description |
| ADE |
Microsoft Access Project Extension |
| ADP |
Microsoft Access Project |
| BAS |
Visual Basic® Class Module |
| BAT |
Batch File |
| CEO |
Extension associated with Winevar Worm |
| CHM |
Compiled HTML Help File |
| CMD |
Windows NT® Command Script |
| COM |
MS-DOS® Application |
| CPL |
Control Panel Extension |
| CRT |
Security Certificate |
| EXE |
Application |
| HLP |
Windows® Help File |
| HTA |
HTML Applications |
| INF |
Setup Information File |
| INS |
Internet Communication Settings |
| ISP |
Internet Communication Settings |
| JS |
JScript® File |
| JSE |
JScript Encoded Script File |
| LNK |
Shortcut |
| MDB |
Microsoft Access Application |
| MDE |
Microsoft Access MDE Database |
| MSC |
Microsoft Common Console Document |
| MSI |
Windows Installer Package |
| MSP |
Windows Installer Patch |
| MST |
Visual Test Source File |
| PCD |
Photo CD Image |
| PIF |
Shortcut to MS-DOS Program |
| REG |
Registration Entries |
| SCR |
Screen Saver |
| SCT |
Windows Script Component |
| SHB |
Shell Scrap Object |
| SHS |
Shell Scrap Object |
| URL |
Internet Shortcut (Uniform Resource Locator) |
| VB |
VBScript File |
| VBE |
VBScript Encoded Script File |
| VBS |
VBScript Script File |
| WSC |
Windows Script Component |
| WSF |
Windows Script File |
| WSH |
Windows Scripting Host Settings File |
| ZIP |
Encrypted ZIP files, normal ZIP files are unaffected |
If you send or are sent an e-mail with an attachment that has one
of these extensions, you will receive an automatic e-mail explaining that the e-mail message did not go
through.
If you have to send or receive a file with one of these
extensions, this is what you will have to do:
- Zip the file using WinZip or other such program. This also
helps to reduce network traffic load by the file now being in a smaller size.
- Change the extension. You could do this by right-clicking on
the file, and rename. A suggestion would be to rename only the extension to something
else, then in the body of the message, instruct the recipient on what to change
the extension to.
Thank you for your continued support and understanding.
Last updated:
28 June, 2004
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