On 8 Dec 2016, at 3:49, Hajo Locke wrote:
What is the reason for this behvaiour?
It assures that main.cf is always a complete consistent file, not a mix of blocks from old and new versions due to a half-completed rewriting of the file. The Postfix master process can spawn new short-lived service processes at any time on demand, so it is essential for main.cf to be in a consistent state at all times, not in the middle of a change.
