SOA
Start of Authority
Primary NS
Mailbox
postmaster.inet.vn
Serial
2015072801
Refresh
10800
Retry
3600
Expire
604800
Minimum TTL
360
NS
Nameservers
MX
Mail Exchangers
TXT
TXT Records
v=spf1 a a:spf.vinahost.vn mx +include:sendgrid.net +include:smtpservice.net ~all DMARC
v=spf1 +mx +a +ip4:125.212.217.248 ~all
A