Setup the Gmail APP password

  1. Setup Gmail 2-step verification, than visit blow website to create app password. https://myaccount.google.com/apppasswords

Configure ghost config file

config.production.json

"mail": {
    "transport": "SMTP",
    "options": {
      "service": "Google",
      "host": "smtp.gmail.com",
      "port": 587,
      "auth": {
        "user": "cloud8866top@gmail.com",
        "pass": "password"
      }
    }
  },