This is an good and humane point. For as long as I've been computering, exim has been mostly a punch line, but the guy behind it is not a bad person. Actually wrote a memoir that's a good read.

hoot: https://twitter.com/colmmacc/status/1140433695276322817

@colmmacc: You probably shouldn't run exim. But exim really means a lot to me. I'm super grateful to its main author, the wonderful and generous Phil Hazel (who also wrote PCRE), for showing just how much one person can do. He has a memoir here: http://people.ds.cam.ac.uk/ph10/CIHK.pdf https://twitter.com/tqbf/status/1140424489752322048

@colmmacc: My favorite thing is that he started writing exim in his 50s, and it really is something to learn from. He found the time to give me great feedback on my code changes when I was pretty bad at them, and it meant a lot to me.