Friday, June 29, 2007

Guest Tips 1: Outlook Extension blocking

A couple of Guest tips. 3 actually, these from a friend of mine, whose
Blog
can be found here.

So without further Ado
Tip #1
Here is a little registry hack to allow .exe and .zip attachments in Outlook
(if you really have to accept them, which the folks at Microsoft think
you don't...)

Please make sure you have backed up your registry first.
If you don't know how - please stop now!

Using regedit or regedit32, or some other tool to edit the registry, browse to
the following key:
HKEY_CURRENT_USER\Software\Microsoft\Office\10.0\Outlook\Security\

Create a new String value called Level1remove and set the value = "exe;zip"

The reason this works:

Microsoft have built in two levels of attachment "protection" in Outlook.
Level 1 (these files cannot be received) which consists of a whole load of
dangerous file types; and Level 2 (these files must be downloaded to disk
before opening) which has no extensions by default and is user configurable.

Quite sensibly someone in Microsoft decided that to allow users to remove items
from Level 1 would be silly. Obviously users are "clickers" and want to be able
to receive everything and click on the virus payload if they so wish!

So, failsafes were built in:
Extensions on the Level 1 list will always be considered a threat
(no matter what action is taken by user or administrator).

Level 1 cannot be modified through the front end.

A system administrator can (if (s)he knows how) demote Level 1 "threats" to
Level 2 using the above registry key. This means that users will then be able to
receive the attachments but will still not be able to just "click" them open. The
file must be saved to disk first. Any user who will go to the trouble of saving
the attachment and opening it deserves what they get if it really is a threat.

You can include any extension in this string
(as long as it is on Microsoft's Level 1 restrict list obviously).

4 comments:

Alex said...
This comment has been removed by the author.
Alex said...

For realize actions with outlook and perhaps outlook express files there is good tool to my mind-pst to eml,because it is free as far as I know,and tool has many good capabilities such as recover data after power failures, viruses, hacker attacks and file system corruption can affect mailbox stability and corrupt files of PST format, where Microsoft Outlook stores your mailbox,program can repair your mailbox and convert it to files of *.eml, *.txt and *.vcf formats, that can be opened separately, without any email client,also convert the data to a file with PST extension, this format is supported by Microsoft Outlook,software compatible with all versions of Microsoft Windows and Microsoft Outlook email client, there's only one installation file for all versions, so, you cannot make an error,convert the data to a file of PST format, that can be opened by any version of Microsoft Outlook, that is currently installed on your PC,can proceed very large mailboxes, the size is not limited.

Alexis said...

My nephew had an unpleasant situation.All his mails were corrupted and he used-can read contacts in outlook.Tool decided this problem.Besides that this tool helped me after that.It recovered all mails for free and program showed me how read contacts from pst, decrypt this file and extract all contacts to *.vcf files.

Alex said...

There is a one tool.My brother often uses it.But yesterday he had very big problem with mail from one important person.Mail was corrupted.And I advised to him-from ost to pst.And today he gave me a bottle of wine.Tool solved his problem in seconds and without payment as he said.