configure Outlook 2003 to block additional attachment file name extensions

配置Outlook 2003 以阻止其他附件文件扩展名

1. Click Start, click Run, type regedit, and then click OK.
2. Locate and then click the following key in the registry:
HKEY_CURRENT_USER\Software\Microsoft\Office\11.0\Outlook\Security
3. On the Edit menu, point to New, and then click String Value.
4. Type Level1Add, and then press ENTER.
5. On the Edit menu, click Modify.
6. Type , and then click OK.

Notefile_name_extensions is a list of the attachment file name extensions. Each attachment file name extension is separated by a semicolon. For example, type .zip; .gif if you want to block both .zip and .gif files from appearing in the e-mail message as an attachment.

参考：http://support.microsoft.com/kb/837388