too much space taken up by useless stuff at the top of each message
When I click on a message in my inbox and it expands to full size, the header info at the top of a message takes up 2.75 vertical inches (34%) of the 8 inch viewing window (on a 1920x1080 24" screen). It shows the web site of the "From" person and a Visit Site button, the "Subject" with a read/unread button, and then the web site again and the From/To/CC lines. Each of these 3 section is in its own white-space area with a horizontal border.
This stuff is useless to most people who now how to read a "Subj:" line and can find their way to a web site from the sender.
This takes away precious screen space to read the message.
I just want to see From, To, Subj, CC, BCC, and Reply-To. You could put all of that in 1.25 inches of vertical space. Thank You.