$TTL 1h
@       IN      SOA     ns1.my-ns-server.com. hostmaster.example.com. (
    2007022600	; Serial
    3h		; Refresh
    1h		; Retry
    1w		; Expiry 
    1d		; TTL
)

;;; NS ;;;
	        NS	ns1.my-ns-server.com.
		NS	ns.my-secondary-ns.com.

;;; MX ;;;
		MX 10	mx.example.com.

;;; A ;;;
	        A	127.0.0.1
www		CNAME	@
mx		A	127.0.0.1