Can a virus live in the body of an email message?

Someone I know installed the 30 day trial Kaspersky on their machine and then did a complete virus scan of their system. It reported a couple of infected email "attachments" in one of their Eudora mailboxes. I got a copy of the "infected" mailbox here and did a scan using NOD32 and by design it could not scan the mail box.

After looking through the mailbox with a text editor I found what appears to be code embedded in one of the messages. When one views this particular message in Eudora it does not show this code nor does NOD32 give any indication of an "infection". Must an infection in email be through a file attachment?

Is there any point in submitting only that portion of the Eudora mailbox to VirusTotal to see what it shows?