koster.nl.		30 IN SOA ns3.firstfind.nl. hostmaster.firstfind.nl. (
				2018090401 ; serial
				16384      ; refresh (4 hours 33 minutes 4 seconds)
				2048       ; retry (34 minutes 8 seconds)
				1048576    ; expire (1 week 5 days 3 hours 16 minutes 16 seconds)
				14400      ; minimum (4 hours)
				)

koster.nl.		30 IN TXT ""
koster.nl.		30 IN TXT "v=spf1 include:vpo.nl mx ip4:5.102.137.105 ~all"

koster.nl.		30 IN A	5.102.137.31

Mail exchangers:
koster.nl.		30 IN MX 10 mx2.vpo.nl.
koster.nl.		30 IN MX 15 mx3.vpo.nl.
koster.nl.		30 IN MX 5 mx1.vpo.nl.

Name servers:
koster.nl.		30 IN NS ns5.firstfind.net.
koster.nl.		30 IN NS ns3.firstfind.nl.
koster.nl.		30 IN NS ns4.firstfind.nl.