search/trash/favorite icons next to 'sender' not in best place
When hovering on a email message, I twice, accidentally deleted it. Often times users click anywhere on the line be it where the sender is (on the left) or on the message title, or in the middle between the sender and the title. The search feature is also located there which I have inadvertantly clicked on before as well. When a long senders address is there, hovering over it could cause you to delete it by mistake. this may not be the best place for those icons.