By default the columns are 'To Do', 'Doing' and 'Done' but this is just an example and can be changed. The idea of Drag is to be a universal way to manage your emails. Whether that's a To Do list or simply a better way to categorize your emails.

Some of our internal team are simply creating multiple lists so they're visually available (to be dealt with) in a more intuitive way than Inbox or traditional Gmail.

Love to hear your thoughts. Always good to get feedback from users of like-minded products/features.