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>there didn't seem to be any way to undo that action. Well thank God there isn't a button to undo sent mails.

• jkaplowitz 3y ago
  In many email systems there is an undo send feature. Outside of those closed contexts where yanking a message out of the recipient’s inbox is possible, it is generally implemented by waiting a few seconds between when the UI says the message has been sent and when the message is actually sent. During that interval, an undo send option is offered which simply cancels the upcoming send action.
  • onionisafruit 3y ago
    Nothing calls attention to an email better than those messages saying that the sender wishes to retract a message you have already downloaded.
    • jkaplowitz 3y ago
      Yes, and those recall messages only exist in the closed systems where such retraction is possible, or in the open systems which send those messages that are more designed for the closed systems. The implementation I described with a slightly delayed send doesn’t use those recall messages, since the email being sent doesn’t actually get sent until after the delay. I believe this is how Gmail’s version of the feature works, for example.