Freshinbox lets you organize your inbox with kanban boards.
Freshinbox comes with both personal and team boards. With the personal board, you can sort your inbox into different stages of your workflow. The emails inside a personal board are not shared with anybody else and remain private. You cannot collaborate on emails inside a personal board.
With team board, you can sort, share and collaborate on emails with your team together. The emails inside team board will be shared with all the members of the board. You can assign emails to your teammates and discuss in real-time using comments.
Click here to learn how to create a team board.