$ORIGIN example.org.
$TTL 12345
@		IN	SOA	ns1.example.org.	root.example.org. (
2023080200	; serial (YYYYMMDDNN)
3600		; refresh (seconds)
900		; retry
1814400		; expire
12345		; TTL
)
		IN	NS	ns1.example.org.
		IN	A	127.0.0.1
		IN	MX	10	ns1
gem	42	IN	A	127.0.0.1
mail		IN	A	127.0.0.1
ns1		IN	A	127.0.0.1