The &quot;delay for later&quot; feature is tremendously useful compared to traditional inbox handling.<p>Of course, to trust that feature, it also has to be tremendously reliable, and that&#x27;s the biggest thing that Mailbox got right in the first place. That&#x27;s also why it very handily beat out Mail Pilot, which had the same idea and got started earlier but to this day is still filled with terrible bugs.