I there any way/setting where we can mark all unread mail as read without selecting it individually and markings read.
You can go the “Unread” section, and from the top menu select Edit > Mark All as Read and mark 200 at a time as read. Granted you can do this from any section, but you will likely mark fewer than 200 as it only loads 200 at a time, read or unread.
You will need to click away from the unread section and click back for the section to refresh with a new batch of unread messages, but I was able to read 2,000+ messages in a few minutes this way.
Understood, but it’d be nice to be able to right click on a folder and “Mark all as read” for separate folders.