mercurycorp.com.vn.	30 IN SOA vdc-hn01.vnn.vn. postmaster.vnn.vn. (
				2021042201 ; serial
				3600       ; refresh (1 hour)
				3600       ; retry (1 hour)
				1209600    ; expire (2 weeks)
				3600       ; minimum (1 hour)
				)

mercurycorp.com.vn.	30 IN TXT "v=spf1 a mx include:spf.vnptemail.vn ~all"

mercurycorp.com.vn.	30 IN A	123.30.109.6

Mail exchangers:
mercurycorp.com.vn.	30 IN MX 10 mx.vnptemail.vn.

Name servers:
mercurycorp.com.vn.	30 IN NS vdc-hn01.vnn.vn.
mercurycorp.com.vn.	30 IN NS hcm-server1.vnn.vn.