Quote Worth Quoting
I really like the programmer of Postfix:
These changes do affect external behavior. Therefore they had better be configurable, to ensure that there is a way to keep Postfix working with software as before.
I don’t care that the breakage is not Postfix’s fault. It worked, and it must be made to work again.
We make this mistake all the time of introducing an improvement without providing a way to turn it off, so we’re not learning.
Nice to see someone more important than many of the fanatics is thinking this way. (For reference, the incompatibilities being discussed on the mailing list were Outlook-related.)