If you’ve ever tried to report SPAM with Outlook 2003 then you know what a pain it is to get the full message header. Outlook 2003 also lacks the “Forward As Attachment”. This source provides information on how to view the full message source. This source provides information on how to forward messages as attachments (look toward the bottom of the thread).
If you’re using Outlook and wondering why you’re still get image-based SPAM even though you have images turned off then you might want to read this source. There is some information here as to ways to filter out this type of SPAM.