> > Is there any reason other than history why Ack should be different > from > > other options? > > "Default-Options=" has only been applied to non-subscribers since 1.8d, > so most lists use "Ack=" to set the default for the ACK option for non-subscribers, > and we need to maintain compatibility. > > Eric So, Default-Options are applied to non-subscribers (where meaningful), but not to sublist subscribers? And sublist subscriber settings are not honored for posts to the superlist? And for non-subscribers, only Ack= is honored, but not Default-Options=Ack/NoAck? With subscribers it's never been obvious to me which takes precedence if both are specified.