There are voice-activated programs out there for this exact problem. Try this one out, it is very good and free,,,
http://www.naturalreaders.com/order_information.htm
If that does not help, you can try Windows Voice Recognition, or do a search for (and use this exact phrase) "free, program to read emails aloud".
Hope it helps...
From the ramblings of an unstable mind...
A Lad Insane