iosvn.vn.		30 IN SOA george.ns.cloudflare.com. dns.cloudflare.com. (
				2404110050 ; serial
				10000      ; refresh (2 hours 46 minutes 40 seconds)
				2400       ; retry (40 minutes)
				604800     ; expire (1 week)
				1800       ; minimum (30 minutes)
				)

iosvn.vn.		30 IN TXT "v=spf1 mx include:103.200.23.139 -all"

iosvn.vn.		30 IN A	103.179.188.241

Mail exchangers:
iosvn.vn.		30 IN MX 10 mail.iosvn.vn.

Name servers:
iosvn.vn.		30 IN NS george.ns.cloudflare.com.
iosvn.vn.		30 IN NS jean.ns.cloudflare.com.