29. Turntable, confidence (in the delivery of the message to the right
Someone has to send different e-mails to different persons. By mistake,
he doesn't send the right message to the right person, which can be confusing
(typing error in address field). Next time he will be afraid of using it,
he will use phone which provides better feedback on who you are talking
Example(s): With the previous example, it could be profitable to be able
to withdraw a mail if it hasn't been read (mail undo).
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