Email Formats

{
  "mx": [
    "10 mx01.sjtu.edu.cn.",
    "10 mx02.sjtu.edu.cn.",
    "20 mx03.sjtu.edu.cn.",
    "20 mx04.sjtu.edu.cn."
  ],
  "spf": [
    "v=spf1 ip4:202.112.26.0/24 ip4:202.120.2.0/24 ip4:202.121.179.0/24 ip4:111.186.58.48 ip4:111.186.58.61 ip4:111.186.58.62 ip4:111.186.58.66 ip4:111.186.58.24 -all"
  ]
}