Eliminate wasted space at top
Too much space is wasted on the inbox window. Users should be able to turn off the black navigation row at the top. (The one that goes Home Mail News Finance Sports etc.) Just below that the bar with the search box in the middle is twice the height that it needs to be. Eliminating the black row and then resizing the next one would mean a lot more space down below for navigating through email messages.
1st
ranked

-
Thanks for the feedback, Don! We will share this with the rest of the team. Thanks again!