{
  "name": "发送邮件",
  "worker_nums": "$ENV.SEND_MAIL_WORKER_NUMS",
  "attempts": 3,
  "attempt_after": 200,
  "timeout": 2,
  "size": 1000,
  "process": "scripts.mail.Send",
  "event": {
    "next": "scripts.mail.NextID",
    "add": "scripts.mail.OnAdd",
    "success": "scripts.mail.OnSuccess",
    "error": "scripts.mail.OnError",
    "progress": "scripts.mail.OnProgress"
  }
}