可参见各接口的错误码
更详细的错误码:全局错误码(请注意查看分页)
服务器端错误
HTTP 状态码  | 错误代码  | 描述  | 语义  | 
503  | ServiceUnavailable  | The request has failed due to a temporary failure of the server.  | 服务不可用。  | 
500  | InternalError  | The request processing has failed due to some unknown error, exception or failure.  | 内部错误。  | 
400  | MissingParameter  | The input parameter   | 缺少必填参数。  | 
400  | Forbidden  | User not authorized to operate on the specified resource.  | 没有权限使用该操作,请检查 RAM 的子账户是否赋予邮件推送服务的权限。 权限名称: 
  | 
400  | Signature  | Specified signature is not matched with our calculation  | 
  | 
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