Email Formats

{
  "mx": [
    "10 mail.21at.com.cn.",
    "10 mx-21stc-com-cn.icoremail.net."
  ],
  "spf": [
    "v=spf1 include:spf.icoremail.net -all",
    "v=spf1 a mx include:spf.icoremail.net -all"
  ]
}