Postfix

It is Wietse Venema's mail server that started life at IBM

Free software · by IBM · postfix.org

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What Postfix’s own pages say

What it says it doesIt is Wietse Venema's mail server that started life at IBM postfix.org
PlatformsAIX, BSD, HP-UX, Linux, MacOS X, Solaris postfix.org

Each value is a quote AirStack found on the product’s own pages, read 2026-11-04. A missing field means AirStack has not found it on its pages.