ptld.net.		30 IN SOA ns.ptld.net. postmaster.ptld.net. (
				2022042501 ; serial
				3600       ; refresh (1 hour)
				60         ; retry (1 minute)
				604800     ; expire (1 week)
				86400      ; minimum (1 day)
				)

ptld.net.		30 IN TXT "v=spf1 ip4:219.117.242.11/28 mx ptr a:ns.ptld.net
mx:mail.ptld.net ~all"

ptld.net.		30 IN A	219.117.242.11

Mail exchangers:
ptld.net.		30 IN MX 10 mail.ptld.net.

Name servers:
ptld.net.		30 IN NS ns.ptld.net.
ptld.net.		30 IN NS tegtan3.interlink.or.jp.