{
  "host": "smtp.ukr.net",
  "port": 465,
  "username": "thingsboard@ukr.net",
  "password": "thingsboard123",
  "otherProperties": [
    {
      "key":"mailsmtp.auth",
      "value":"true"
    },
    {
      "key":"mail.smtp.starttls.enable",
      "value":"true"
    }
  ]
}