pps.vn.			30 IN SOA x.hkda.vn. kythuat.hkda.vn. (
				2025022800 ; serial
				3600       ; refresh (1 hour)
				1800       ; retry (30 minutes)
				1209600    ; expire (2 weeks)
				86400      ; minimum (1 day)
				)

pps.vn.			30 IN TXT "v=spf1 +a +mx +ip4:45.119.84.172 ~all"

pps.vn.			30 IN A	45.119.84.172

Mail exchangers:
pps.vn.			30 IN MX 0 pps.vn.

Name servers:
pps.vn.			30 IN NS y.hkda.vn.
pps.vn.			30 IN NS z.hkda.vn.
pps.vn.			30 IN NS x.hkda.vn.