$TTL 604800 @ SOA localhost. root.localhost. ( 1 ; Serial 604800 ; Refresh 86400 ; Retry 2419200 ; Expire 604800 ) ; Negative Cache TTL NS localhost. MX 10 mail.jones.dk. ; MX 50 mail.haakansson.com. ; MX 50 mail.idraetsdaghojskolen.dk. MX 50 mail.bitbase.dk. MX 50 mail.homebase.dk. TXT "v=spf1 mx -all" A 62.243.165.91 * A 62.243.165.91 TXT "v=spf1 -all"