tula.vn.		30 IN SOA ns1.digipowerdns.com. root.tula.vn. (
				2019103141 ; serial
				7200       ; refresh (2 hours)
				1800       ; retry (30 minutes)
				604800     ; expire (1 week)
				300        ; minimum (5 minutes)
				)

tula.vn.		30 IN TXT "v=spf1 mx include:emailserver.vn
include:spf.protection.outlook.com -all"

tula.vn.		30 IN A	45.117.177.22

Mail exchangers:
tula.vn.		30 IN MX 0 pro204.emailserver.vn.

Name servers:
tula.vn.		30 IN NS ns4.digipowerdns.com.
tula.vn.		30 IN NS ns2.digipowerdns.com.
tula.vn.		30 IN NS ns3.digipowerdns.com.
tula.vn.		30 IN NS ns1.digipowerdns.com.