Email Formats

{
  "mx": [
    "20 mx2.tongji.edu.cn.",
    "10 mx1.tongji.edu.cn.",
    "5 mx-tongji-edu-cn.icoremail.net."
  ],
  "spf": [
    "v=spf1 ip4:202.120.164.161 ip4:202.120.164.162 ip4:202.120.164.163 ip4:202.120.164.170 ip4:202.120.164.171 ip4:202.120.164.172 ip4:202.120.164.180 ip4:202.120.164.181 ip6:2001:da8:b8:124::/64 include:spf.icoremail.net -all"
  ]
}