{
  "attachments": [
    {
      "file": "string",
      "name": "string"
    }
  ],
  "bcc": "string",
  "cc": "string",
  "content": "string",
  "delivery": {},
  "ext_msg_id": "string",
  "from": "string",
  "from_customer_id": "string",
  "mailbox_id": "string",
  "priority": "integer",
  "read": "boolean",
  "reply_to_ext_msg_id": "string",
  "set_reminder": {
    "delay": "integer",
    "number_left": "integer"
  },
  "subject": "string",
  "thread_id": "string",
  "to": "string"
}

{
  "errors": [
    {
      "code": "string",
      "deprecated": "boolean",
      "message": "string",
      "will_be_deprecated": "boolean"
    }
  ]
}