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Unsafe Attachments
I can not send links or .exe files in updated Outlook 2000
and Oficce XP. It will not send them. I have edited the registry and added the extensions .exe;.aspx;htm etc in level1add and remove string values as talekd about he It still does not [work- can anyone help thanks in advance- Ron Why do I get "Outlook blocked access to the following potentially unsafe attachments: [...]" error messages opening my email? Problem Outlook 2002 includes a new security feature that blocks attachments considered unsafe. If you receive an e-mail message that contains one of the blocked file types, you may see the following warning message: Outlook blocked access to the following potentially unsafe attachments: [.] Although access to the attachment has been blocked, the attachment still exists in the message. This article summarizes what to do if you need to access the attachment. Discussion This security feature provides an additional level of protection against malicious e-mail messages. Updates were available for earlier versions of Microsoft Outlook, but in Outlook 2002 this security feature is implemented by default. Use one of the following recommended methods to obtain access to the attached file: Request that the sender post or save the attachment to a file share and send you the link to it. Request that the sender use a file compression utility that changes the file extension. Request that the sender rename the file extension and send it to you. Once you receive the renamed attachment, you can rename the file with the original extension. If the previously recommended methods do not meet your needs, you may use one of the following alternate methods: If you are in a Microsoft Exchange Server environment and your administrator has configured the Outlook Security settings, ask the administrator to modify the security settings for your mailbox. If you are not in an Exchange Server environment, modify the registry to customize the attachment security settings. Microsoft Exchange Server Environment If you run Outlook in an Exchange Server environment, your administrator can change the default attachment security behavior. Attachment Behavior Attachments are divided into three groups based on their file extension, or type. Outlook handles each group in a specific way. Level 1 ("Unsafe") The "unsafe" category represents any extension that may have script or code associated with it. Any attachment with an "unsafe" file extension is inaccessible if you use a version of Outlook that has the security patch applied to it. The following list contains attachments that are considered unsafe: File extension File type ..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 ..mdb Microsoft Access program ..mde Microsoft Access MDE database ..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 ..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 Script Host Settings file The following list describes how Outlook functions when you receive an "unsafe" file attachment: Any "unsafe" attachment is not accessible. You cannot save, delete, open, print, or otherwise manipulate "unsafe" files. The top of the e-mail message indicates that Outlook has blocked access to the "unsafe" attachment; the attachment is not accessible from Outlook, however, the attachment is not actually removed from the e- mail message. If you forward an e-mail message with an "unsafe" attachment, the attachment is not included in the forwarded e-mail message. If you send an e-mail message that contains an "unsafe" attachment, you receive a warning message that says other Outlook recipients may not be able to access the attachment that you are trying to send. You can either disregard the warning message and send the e-mail message, or you can choose to not send the e-mail message. If you save or close an e-mail message that contains an "unsafe" attachment, you receive a warning message that says you will not be able to access the attachment from Outlook. You can override the warning message and save the e-mail message. You cannot open objects that are inserted into Microsoft Outlook Rich Text messages by using the Insert Object command. You do see a visual representation of the object, but you cannot open or activate the object in the e-mail message. You cannot open "unsafe" files that have been directly stored in an Outlook or Exchange Server folder. Although these files are not attached to an Outlook item, they are still considered "unsafe." The following error message occurs in this situation: Can't open the item. Outlook blocked access to this potentially unsafe item. Level 2 Level 2 files are not "unsafe" but they do require more security than other attachments. When you receive a Level 2 attachment, you are prompted to save the attachment to a disk; you cannot open the attachment from within the e- mail message. By default, file extensions are not associated with this group, however, you can add file extensions to the Level 2 list. NOTE: The list of files that are included in the Level 2 category can only be changed if you are using Outlook in a Microsoft Exchange Server environment and your mail is being delivered to an Exchange Server mailbox. These changes must be made by an administrator. Other Attachments When you try to open an attachment other than those in the "unsafe" or Level 2 lists, you are prompted to either open the file directly or to save it to a disk. You can turn off future prompts for that extension if you click to clear the Always ask before opening this type of file check box. NOTE: If a program associates itself with a new file extension, that file extension is treated as an "other" attachment until you add the file extension to the "unsafe" list. For example, if you install a program on your computer that uses files with an .xyz file extension, whenever you open an attachment that has an .xyz file extension, the new program opens and runs the attachment. By default, the .xyz file extension is not on the "unsafe" or Level 2 list, so it is treated as an "other" file extension. If you want attachments with the .xyz file extension to be treated as "unsafe," you must add the .xyz file extension to the list of "unsafe" file extensions. Solution You can modify the attachment security behavior in Outlook 2002 if you are using Outlook in one of the following scenarios: Outlook is run outside of an Exchange Server environment. In an Exchange Server environment, the administrator has not configured the Outlook Security settings to disallow changes to the attachment security behavior. In these scenarios, modify the attachment security behavior by making a modification to the registry. Perform the following steps to modify the registry: NOTICE: The following procedure contains information about editing the Windows registry. Dell does not guarantee success or support these actions. Any use of the information provided herein, is performed at your own risk. You should make a backup copy of the registry files prior to executing any of the following steps. Incorrect use of the registry editor and editing the registry files can cause serious problems that may require a complete reinstall of your operating system. Dell assumes no responsibility, expressed or implied, regarding the consequences of any action taken as a result of the information provided herein. Exit Outlook 2002, if running. Click the Windows Start button, then click Run, in the Open box, type regedit, and then click OK. In the left pane, click on the plus next to the following registry keys: HKEY_CURRENT_USER Software Microsoft Office 10.0 Outlook Security Click Edit, click New, and then click String Value. Type the following name for the new value: Level1Remove Press the Enter key. Right-click the new string value name, and then left-click Modify. Type the extension of the file type that you would like to access with Outlook 2002 as follows: ..exe To specify multiple file types, separate them with a semicolon, using the following format: ..exe;.com When finished, click OK. Exit the Registry Editor program. When you start Outlook 2002, the file types specified in the Windows Registry are accessible. NOTE: It is recommended that only the necessary file types be enabled for access. If a particular file type is received rarely, it is recommended that Outlook 2002 be given temporary access to the file type in question and then reconfigured to the blocked state by undoing the changes made to the Windows Registry. The information contained in the above document consists of excerpts from Microsoft Knowledge Base. Any content editing was done for space considerations. Where possible, the document was left in its entirety. The technical information and troubleshooting described herein are for informational purposes only. For additional information or the complete document, please go to: http://support.microsoft.com/directory/ Article ID: Q290497 Title " OL2002: Cannot Access Attachments" ----------------------------------------------------------- --------------------- |
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