Email Formats

{
  "mx": [
    "5 mxbiz1.qq.com.",
    "10 mxbiz2.qq.com."
  ],
  "spf": [
    "v=spf1 include:spf.mail.qq.com ~all",
    "v=spf1 include:spf.zmail300.cn ~all"
  ]
}