Postfix https://en.wikipedia.org/wiki/Postfix_(software) https://en.wikipedia.org/wiki/Postfix_(software) Seems initially the work of a single person, though

Postfix https://en.wikipedia.org/wiki/Postfix_(software) https://en.wikipedia.org/wiki/Postfix_(software) Seems initially the work of a single person, though I have no doubt others contributed greatly also.