Email Formats

{
  "mx": [
    "10 mx.maillb.baidu.com.",
    "20 mx.baidu.com."
  ],
  "spf": [
    "v=spf1 include:spf1.baidu.com include:spf2.baidu.com include:spf3.baidu.com include:spf4.baidu.com -all"
  ]
}