The hard part here is not recording the check on the box--any email service provider will handle that. The hard part is the "full understanding." Historically l

The hard part here is not recording the check on the box--any email service provider will handle that. The hard part is the "full understanding." Historically lots of us have a) been willfully unclear about what it means to subscribe to a list b) changed what our mailings are like over time. We can stop doing (a), with effort, but I don't see how (b) will ever go away. So this is going to be continuous, active effort with subscribers. I would like to think that very easy, reliable, one-click unsubscribe will be sufficient.