Ctrl + R Reply (add shift for Reply All)
Ctrl + F Forward message
Ctrl + J Flag as junk (or not junk if it’s already flagged)
Ctrl + M Move message to a different folder
Ctrl + U Mark message as unread (use Ctrl + Q to mark as read)
Ctrl + Shift + U Only show unread messages (use Ctrl +
Shift + A to go back)