Email Formats

{
  "mx": [
    "50 mailgw1.hkelectric.com.",
    "50 mailgw2.hkelectric.com.",
    "50 mailgw3.hkelectric.com.",
    "50 mailgw4.hkelectric.com.",
    "100 relay.on-nets.com."
  ],
  "spf": [
    "v=spf1 mx ip4:210.3.21.161 ip4:210.3.21.162 ip4:210.3.21.243 ip4:210.3.21.247 ip4:210.3.21.248 ip4:210.3.21.221 -all"
  ]
}