With at least the more advanced versions of Windows 7, Window Mail is there, albeit, possibly hidden, at least the WinMail.exe file is hidden.
I've activated Windows Mail on every install of Windows 7 that I've been involved in.
It demands that you UN-Hide all Hidden Files and then Take Ownership of the Windows Mail folder.
Then replace the msoe.dll file with the one from Windows Vista.
A package with all the files needed are available here: (with instructions in a readme file)
Link Removed due to 404 Error Then Windows Mail will run and is just as easy to set up as Outlook Express 6.
Cheers Mates!
Old Timer
PS: On one PC, Windows Mail would not run, no matter what magic I tried.
So I installed Mozilla Thunderbird. It's a good replacement for Outlook Express 6.
Easy to set up and easy to use and Very Stable.
https://www.mozilla.org/en-US/thunderbird/download It's only 13.4 megs in size and I just downloaded the latest version is about 20 sec's.