I would love to be able to send an email tomorrow. I like to respond to some emails to get them out of the way, but the more email I send, the more I get. I wou

I would love to be able to send an email tomorrow. I like to respond to some emails to get them out of the way, but the more email I send, the more I get. I would therefore love to be able to slow down the exchanges. Gmail has only a limited-time undo, with delay that's too short and almost entirely useless. I'd be quite happy with a default, say, 5-minute delay and undo. Similarly, it would be awesome to hide inbound email until I want to see it (while I am still able to use my mailbox to send email and respond to already-received messages.) EDIT: Ah, it turns out Gmail can schedule email sending. Thanks @llarsson!