Hi John,
Are you using Windows Live Mail? If so, then you can find the e-mail message store here:
C:\Users\UserName\AppData\Local\Microsoft\Windows Live Mail
Replace UserName with your Windows 7 user name. One of the subfolders you see contains the messages. although the name of the folder varies depending on your account. For example, on my system the folder is named "Mcfedries ( 48e". You'll know you've found the right folder if when you open it you see at least the following subfolders: Deleted Items, Drafts, Inbox, Junk E-mail, and Sent Items. These folders contain the individual message files.
-Paul