Steve:
> I've recently noticed that my Postfix is being a naughty bunny. It is
> attempting to query my ISP nameserver to reverse resolve LAN addresses
> defined in my_networks.
There are many errors in that statement.
1) Postfix does not send DNS queries to your ISP, or to anyone else.
2) The choice between /etc/hosts and DNS is made by nsswitch.conf
(or equivalent; I am assuming Linux for the sake of simplicity).
3) The choice between local zone files and your ISP is made by the
name daemon config file and by /etc/resolv.conf.
Wietse
