Email Formats

{
  "mx": [
    "10 mx2.uec.ac.jp.",
    "1000 mx-backup.uec.ac.jp.",
    "5 mx.uec.ac.jp."
  ],
  "spf": [
    "v=spf1 +ip4:130.153.0.0/16 include:_spf.google.com ~all"
  ]
}