Attachment blocking in Exchange/Outlook

[Anon]

We are currently running Exchange 5.5 and Outlook 2000 on a Windows NT Server. Due to the security "upgrades" in Outlook 2000, all executable files are being blocked at the sender as well as the recipient. What this means is that we cant even send executable file types (including MS Office files) internally. Im looking for some control over this. So far all that Ive found is a white paper that involves setting up a public form to define the security. What the white paper doesnt mention is that the process is applied to the current user and you must be an administrator to apply it (an administrator cannot set it up for someone else due to the nature of the process). Now, I have seen vague references in Outlook help files that say that the Outlook rules can be managed from the Exchange server but Ive looked all through my 5.5 server and see no such option. Im wondering if it isnt referring to Exchange 2000. If anyone can offer some insight, I would appreciate it.

[Anon]

Unfortunately it's all down to the changes that Microsoft has made in Outllib.dll in the security packs. This dll lists all the file extensions that are level 1 (can't be relaxed) and level 2 (can be relaxed).

However, I don't belive that it's possible to relax teh rules under Office 2000, only Office XP.

If you really want to fix it, you'll need to hex-edit the outllib.dll file and simply overtype the values that you want to allow as attachments.

The file address for the attachment list inside outllib.dll is :1201136.