Antonio,
As I suggested before Windows Easy Transfer purports to be able to transfer Email data between machines.
As I have not actually used the application i am currently performing some tests to see if this is a valid claim - The way the program works means that although designed to transfer between machines it should work to restore settings to a re-installed machine also.
As you have said it is not a complete restore solution but I do believe that it may be usable for your purpose, as part of a system restore solution.
I will post back on any findings I make I know that
DocBrown has used this application extensively and successfully so you may want to PM him for his thoughts on it's use