Email Formats

{
  "mx": [
    "50 mail4.achc.com.cn.",
    "30 mail2.achc.com.cn.",
    "40 mail3.achc.com.cn.",
    "20 mail1.achc.com.cn."
  ],
  "spf": [
    "v=spf1 a mx ip4:218.65.6.35/32 ip4:119.97.199.76/32 ip4:110.185.168.180/32 ~all"
  ]
}