Email Formats
{
"mx": [
"20 mail.ncku.edu.tw."
],
"spf": [
"v=spf1 ip4:140.116.229.0/24 ip4:140.116.248.16 ip4:140.116.248.17 ip4:140.116.248.18 ip4:140.116.248.21 ip4:140.116.248.22 ip4:140.116.248.23 include:_spf.google.com ~all"
]
}