The NHS email system hit a rock today.
An unnamed IT staffer sent a test email to a list containing 1.2 million NHS employees. Some of those emailed back to the list with "please take me off this list" or "Did you make a mistake"; each such email resulted in another 1.2 million emails. And some people had "Acknowledge receipt" with mean that just reading that email sent another email.
You can imagine what happened to the email server. It's called an email storm. It's not easy to sort out; you have to filter out emails about the email storm and delete them unsent. It must have been a nightmare for the IT staff.
But what I'm wondering is, how was this even possible? How do you set up an email list of 1.2 million people; you aren't going to be typing them in one at a time.
And when you hit "send", why did the email system allow it through? If I were designing the NHS email system, I'd put an upper limit on the number of people that you could send an email to. Which would be less than a hundred.