Attachment Options is a COM add-in for Outlook 2000 SP3 or higher, Outlook 2002, Outlook 2003 and Outlook 2007 that provides a user interface for changing which file types are restricted as Level 1 attachments. Level 1 attachments are hidden by Outlook, and cannot be seen, saved or opened from Outlook items. Moving an attachment extension to Level 2 enables the user to see the attachment and to save it to the file system. The attachment saved to the file system can later be opened by the user.