;
     ; BIND data file for yourdomain.com
     ;
     @       IN      SOA     yourdomain.com. root.yourdomain.com. (
                                   1         ; Serial
                              604800         ; Refresh
                               86400         ; Retry
                             2419200         ; Expire
                              604800 )       ; Default TTL
     
             IN      NS      dns.yourdomain.com.
     	IN	MX	10	mail.yourdomain.com.
     
     www	IN	A	192.168.100.5
     dns	IN	A	192.168.100.10
     mail	IN	A	192.168.100.20