Article ID: 291387 - View products that this article applies to.
This article was previously published under Q291387
For information about the differences between Microsoft Outlook and Microsoft Outlook Express e-mail clients, click the following article number to view the article in the Microsoft Knowledge Base:
(https://support.microsoft.com/kb/257824/EN-US/ )OL2000: Differences Between Outlook and Outlook Express
This article describes several new features included in Microsoft Outlook Express 6 that are designed to protect you against viruses that may be transmitted through e-mail messages.
Virus Protection features in Outlook Express 6 are found on Security tab of the Tools, Options dialog box.
Using Internet Explorer Security Zone to Disable Active Content in Hypertext Markup Language (HTML) E-mailSecurity zones enable you to choose whether active content, such as ActiveX Controls and scripts, can be run from inside HTML e-mail messages in Outlook Express. By default, Outlook Express 6 uses the Restricted Zone instead of the Internet Zone. Microsoft Outlook Express 5.0 and Microsoft Outlook Express 5.5 used the Internet zone, which enable most active content to run. To customize your Internet Explorer security zone settings for Outlook Express:
CAUTION: Changing security zone settings can expose your computer to potentially damaging code. Use caution when you change these settings.
How to Read all Messages in Plain Text (Service Pack 1 Only)Starting with Service Pack 1, you can configure Outlook Express to read all e-mail in plain text format. Some HTML e-mail may not appear correctly in plain text, but no active content in the e-mail is run when you enable this setting. To read all messages as plain text in Outlook Express Service Pack 1:
How to Prevent Programs from Sending E-mail Without Your ApprovalIf you configure Outlook Express as the default mail handler (or simple MAPI client) on the General tab, Outlook Express processes requests by using Simple MAPI calls. Some viruses can use this functionality and spread by sending copies of e-mail messages that contain the virus to your contacts. By default, Outlook Express 6 prevents e-mail messages from being sent programmatically from Outlook Express without your knowledge by displaying a dialog that enables you to send or not to send the e-mail message.
Using the Internet Explorer Unsafe File List to Filter E-mail AttachmentsTo use the Internet Explorer unsafe file list to filter e-mail attachments:
NOTE: The Internet Explorer 6 unsafe file list includes any file types that may have script or code associated with them. To add additional file types to be blocked or remove file types that should not be blocked:
How to Determine When Outlook Express Has Blocked an AttachmentWhen Outlook Express blocks an attachment, the following alert is displayed in the message alert bar at the top of the e-mail message:
Outlook Express removed access to the following unsafe attachments in your mail: file_name1, file_name2, and so on.
Article ID: 291387 - Last Review: January 31, 2007 - Revision: 4.1