Email Formats

{
  "mx": [
    "15 mail.sjec.com.cn.",
    "5 sjec-com-cn.corpsmtp.net.",
    "10 sjec-com-cn.corpsmtp.cn."
  ],
  "spf": [
    "v=spf1 include:spf.corp-email.com include:spfb.corp-email.com ip4:221.224.68.45/29 ip4:221.224.68.46/29 ~all"
  ]
}