Re: attachments.....
- From: NormCameron <guest@xxxxxxxxxxxxxxxxx>
- Date: Sun, 2 Nov 2008 17:29:23 -0600
Outlook blocks certain types of attachments. Are the ones you are
having problems with included in the list?
Outlook Help .ACICollapsed { display: none; } .ACECollapsed {
display: none; } Blocked attachments in Outlook
To help protect your computer, Microsoft Office Outlook 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. If your
organization uses Microsoft Exchange, only the e-mail server
administrator can unblock these file types. End users of Outlook cannot
unblock these file types.
In this article
- 'Background - The Internet is a dangerous neighborhood'
(http://www.vistax64.com/#1)
- 'How to share your files safely' (http://www.vistax64.com/#2)
- 'Attachment file types blocked by Outlook'
(http://www.vistax64.com/#3)
*Background - The Internet is a dangerous neighborhood*
When Microsoft Outlook 97 first arrived on the market, the Internet
still seemed like a relatively safe place, and sending attachments in
e-mail seemed like a great idea. But then — beginning in March of
1999 when the Melissa virus struck, only to be followed by the ILOVEYOU
virus — reality hit hard. These were the fastest-spreading
viruses ever seen up to that time, and they forced a number of
companies to shut down their e-mail systems, at significant cost. In
order to spread, these attacks relied heavily on fooling people into
believing that infected e-mail messages were coming from someone
familiar, and even many computer experts fell victim to them and became
infected. It is no secret that hackers like to attack the largest
available target — and today, that is Microsoft Office Outlook.
World wide, more than 300 million people use Outlook. Therefore, the
industry and Microsoft customers look to Microsoft to provide
protection against security threats.
Most people agree that the Internet is a wonderful tool, but it is
important to remember that it is also a dangerous neighborhood. Even
people who "know what they are doing" are vulnerable. And hackers are
getting more sophisticated. Microsoft does not want Outlook to be a
medium by which dangerous files can be spread around the Internet.
Outlook, therefore, blocks potentially dangerous attachments and
prevents unauthorized programs from accessing your address book.
Outlook is designed for safety first, so that everyone can keep sending
and receiving e-mail.
[image:
http://www.vistax64.com/global/images/default.aspx?AssetID=ZA100776681033]
'Top of Page' (http://www.vistax64.com/#backtotop)
*How to share your files safely*
The vast majority of people never intend to circulate potentially
dangerous files — and the people who do intend to, use other
methods. Here are a few safe ways to share files:
- Outlook does not block documents that have the following file name
extensions: .xls, .doc, .ppt, and .txt. These file types are the ones
that most people use in their work. However, it is important to keep
in mind that such files can contain macros that have the potential to
spread viruses. So whenever such files arrive in your *Inbox*, use a
'third-party antivirus program'
(http://www.vistax64.com/search/redir.aspx?AssetID=XT010981401033&CTT=5&Origin=HA012299521033)
to scan them before you open them. Also, follow the recommended
directions to 'protect your PC'
(http://www.vistax64.com/search/redir.aspx?AssetID=XT010936451033&CTT=5&Origin=HA012299521033).
- To send a file of a blocked type, you can change the file name
extension so that it does not match any of the blocked ones. For
example, you can rename program.exe as program.exe_ok, and then
attach the file to your e-mail message. Include instructions in the
message about how the recipient can rename the file by using the
original extension (in this case, as program.exe). The key point to
remember here is that you should only open files that you -expect-
from someone.
- Use a zip program to package files before you attach them to your
e-mail message. In the message, you can include instructions that
explain how to extract the files from the zipped package.
- Post the files to a secure network share. Most Internet service
providers (ISPs) offer paying subscribers a space where they can post
files. One method is to 'save files on MSN'
(http://www.vistax64.com/search/redir.aspx?AssetID=XT011894241033&CTT=5&Origin=HA012299521033)
and give your recipients access to them. In your message to the
recipients, you can include a link to the share.
[image:
http://www.vistax64.com/global/images/default.aspx?AssetID=ZA100776681033]
'Top of Page' (http://www.vistax64.com/#backtotop)
*Attachment file types blocked by Outlook*
The following table identifies the file types that Outlook blocks by
default.
File name extension File type .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 .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 .hta Hypertext Application .inf Information or
Setup File .ins IIS Internet Communications 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) .mag Access Diagram Shortcut (Microsoft)
mam Access Macro Shortcut (Microsoft) .maq Access Query Shortcut
(Microsoft) .mar Access Report Shortcut (Microsoft) .mas Access
Stored Procedures (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), MDB 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 .mshxml 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 Settings File .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 Internet
Location .vb VBScript File or Any VisualBasic Source .vbe VBScript
Encoded Script File .vbs VBScript Script File, Visual Basic for
Applications Script .vsmacros Visual Studio .NET Binary-based Macro
Project (Microsoft) .vsw Visio Workspace File (Microsoft) .ws
Windows Script File .wsc Windows Script Component .wsf Windows
Script File .wsh Windows Script Host Settings File .xnk Exchange
Public Folder Shortcut
--
NormCameron
.
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