this post was submitted on 05 Aug 2025
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Today I Learned (TIL)

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You learn something new every day; what did you learn today? Submit interesting and specific facts about something that you just found out here.

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The original was posted on /r/todayilearned by /u/zahrul3 on 2025-08-05 03:26:16+00:00.

Original Title: TIL: Someone at the National Health Service in England sent a test email to 840000 colleagues and another replied all, resulting in one of the largest reply all storms. 168 million emails were sent between people and caused the health system to be down for half a day.

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