u4u.kr.			30 IN SOA ns.mailplug.com. root.mailplug.com. (
				2026041613 ; serial
				21600      ; refresh (6 hours)
				1800       ; retry (30 minutes)
				1209600    ; expire (2 weeks)
				7200       ; minimum (2 hours)
				)

u4u.kr.			30 IN TXT "v=spf1 a mx include:aspmx.googlemail.com include:_spf.google.com
~all"

u4u.kr.			30 IN A	14.49.36.141

Mail exchangers:
u4u.kr.			30 IN MX 20 alt2.aspmx.l.google.com.
u4u.kr.			30 IN MX 30 aspmx5.googlemail.com.
u4u.kr.			30 IN MX 30 aspmx3.googlemail.com.
u4u.kr.			30 IN MX 10 aspmx.l.google.com.
u4u.kr.			30 IN MX 30 aspmx4.googlemail.com.
u4u.kr.			30 IN MX 30 aspmx2.googlemail.com.
u4u.kr.			30 IN MX 20 alt1.aspmx.l.google.com.

Name servers:
u4u.kr.			30 IN NS ns2.mailplug.com.
u4u.kr.			30 IN NS ns.mailplug.com.