Email Formats

{
  "mx": [
    "0 gw1-mail.nctu.edu.tw.",
    "10 gw2-mail.nctu.edu.tw."
  ],
  "spf": [
    "v=spf1 ip4:140.113.2.64/26 ip4:211.76.241.6 ip4:140.113.98.162 ip4:140.113.98.175 ip4:140.113.9.141 include:_spf.google.com ~all"
  ]
}