Mary,
I used to read e-mail this way when I used to use Window Bridge with Eudora. I no longer use this approach. It is easier to skim message summaries, open the ones I am interested in and then continue. Having said that, configure outlook to move to the next message and try the approach. This is an outlook configuration more than a NVDA configuration. Yes, how much of the e-mail header is read remains to be tested.
Pranav