Configuring Information Rights Management for Messaging in Outlook 2003
http://office.microsoft.com/en-us/ork2003/HA011402601033.aspx

Microsoft
2004

Abstract:

Information Rights Management (IRM), a new feature in Microsoft® Office 2003, can help prevent sensitive information from being distributed to or read by people who do not have permission to access the content. In Microsoft Office Outlook® 2003, users can create and send e-mail messages with restricted permission to help prevent messages from being forwarded, printed, or copied and pasted. Microsoft Office 2003 documents, workbooks, and presentations that are attached to messages with restricted permission are automatically restricted as well.