Are you talking about the interface to the sysadmin - the fact we see the nuts and bolts in master.cf? This is of course an unfortunate side effect of the power

Are you talking about the interface to the sysadmin - the fact we see the nuts and bolts in master.cf? This is of course an unfortunate side effect of the power and flexibility on offer. What i was trying to dig at was more about the code than the user facing side of things. It beautifully modular. It clearly written - that's a crazy hard achievement for software as committed to security as postfix. It's dead easy to hack on the code - you could arrive and even without looking at the first class documentation you would be able to tackle implementing a change. The source is that thoughtfully laid out.