Postfix cannot resolve local IPs from Name Server

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http://askubuntu.com – I currently have a server running "Ubuntu Server 12.04.1 LTS" installed with Postfix Bind 9 (Slave) The postfix cannot seem to resolve my internal IPs to Name Server (PTR) entry I have within bind9 settings. eg. I have it resolving to priv-000-020.internal.domain.com by using a bind9 "168.192.in-addr.arpa record in my maste/slave folder which contains a record like this:- $ORIGIN 0.168.192.in-addr.arpa $GENERATE 1-254 $ PTR priv-000-$.internal.domain.com I have checked using nslookup & dig, both work fine without any issues resolving IP to the name. I have (HowTos)