If I understand this feature properly, I'm surprised that any e-mail provider would do this. Is the idea to help people fake it so that it looks like they met deadlines that they didn't actually meet?
Wasn't this an April Fool's joke?
Ahhh... I was feeling so badly that I didn't have any April Fool's jokes played on me today, but I'm all better now!
When all I read was the name, I was thinking maybe it was something to let you schedule messages to be sent later (for all I know, Gmail already has a feature for that), which could be used deceptively I suppose but doesn't seem necessarily so. When I actually read the whole thing, I had about twenty seconds of thinking "No way!" before the dawning of the light that, indeed, there's no way an email provider would do such a thing. Not a legendary April Fools joke, I think, but not bad.