SOA
Start of Authority
Primary NS
Mailbox
hostmaster.chic.vn
Serial
2026110101
Refresh
3600
Retry
7200
Expire
1209600
Minimum TTL
86400
NS
Nameservers
MX
Mail Exchangers
TXT
TXT Records
v=spf1 mx include:emailserver.vn include:spf.protection.outlook.com -all
A