Beware Chesterton's fence. [1] Is the network always reliable? Are the messages supposed to be at-most-once, at-least-once, or exactly-once? What happens if po

Beware Chesterton's fence. [1] Is the network always reliable? Are the messages supposed to be at-most-once, at-least-once, or exactly-once? What happens if power is off when the service is supposed to send the email, and then it comes back: should the email be sent anyway? What if there are five thousand emails waiting to be sent? What if "X is not ready" at the moment, but there's a message waiting to be sent? A lot of that complication might be because, like Spolsky says [2], it "fixes that bug that Nancy had when she tried to install the thing on a computer that didn’t have Internet Explorer". [1] https://abovethelaw.com/2014/01/the-fallacy-of-chestertons-fence/ https://abovethelaw.com/2014/01/the-fallacy-of-chestertons-f... [2] https://www.joelonsoftware.com/2000/04/06/things-you-should-never-do-part-i/ https://www.joelonsoftware.com/2000/04/06/things-you-should-...