An anonymous reader shares a Business Insider report:The NHS's 1.2 million employees are currently trapped in a "reply-all" email hell. A "test" email was accidentally sent to everyone who works at the UK health service - prompting a series of reply-all responses from annoyed recipients going out to all 1-million-plus employees of the organisations. An NHS employee told Business Insider that there have been at least 120 replies so far -- meaning that more than 140 million needless emails have been sent across the NHS's network today. As a result, they said, its email systems are running "very slow today." The NHS Pensions department is currently warning people on Twitter that "if contacting us by email please be aware that there may be delays in responding due to an issue currently affecting all NHS mail."