Alright, I just did a test....
Using my stock email app that came with my Charge, ANY forwards of emails end up turning out like crap. NO header info, and weirds it up.
I even tried going and doing some editing on the forward... and that made it worse!
Sounds like you will need to look at 3rd party email apps and find one that does forwarding well... I doubt its Exchange or if you could do anything about it IF it is anyway.
Beyond that, I don't know. Sorry.