Paddings are way too large, text is too big:
- Around the top nav bar
- The rows with the emails are way too large, I'd like to see more of them on my screen
- The buttons are way too big they have too much padding

Other issues :
The search bar is not centered in the middle
Hovering over the rows (emails) has an outer box shadow which feels clunky, I prefer the subtle highlights.
The new message button is HUGE too much padding and margins