Email Formats

{
  "mx": [
    "20 mx2.feishu.cn.",
    "10 mx1.feishu.cn.",
    "30 mx3.feishu.cn."
  ],
  "spf": [
    "v=spf1 mx a ptr a:smtp2.ample.sg ip4:120.76.167.155 include:139768776.spf01.hubspotemail.net include:_spf.mlsend.com include:_netblocks.m.feishu.cn ~all"
  ]
}