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    This is a delightful read. It’s long, but it’s clearly written, has some interesting details and anecdotes, and serves as a window into a part of hacker culture that’s not often seen.

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      For reference: https://en.wikipedia.org/wiki/Philip_Hazel - the author of exim.

      Only skimming it, but I liked this paragraph:

      The early releases of Exim were numbered 0.00, 0.01, and so on, and one day, when we had got to 0.57, I had a phone call from The Welding Institute (now branded as TWI), a research-based company near Cambridge. The caller was their postmaster, who wanted to run Exim on their mail servers, but his boss would not allow any software with a version number less than 1.00 to be used. Fortunately, a new release was being prepared, so I released it a few days later as 1.58, and everybody was happy.