$ORIGIN example.org.
$TTL 12345
@		IN	SOA	ns1.example.org.	root.example.org. (
; YYYYMMDDNN
  2023080300	; serial
  3600			; refresh (seconds)
  900			; retry
  1814400		; expire
  12345			; TTL
)
		IN	NS	ns1.example.org.
		IN	A	127.0.0.1
		IN	MX	10	ns1
		IN	TXT	"v=spf1 mx -all"
gem	640	IN	A	127.0.0.1
mail		IN	A	127.0.0.1
ns1		IN	A	127.0.0.1