553 you don't authenticate or the domain is not allowed relay
2016/5/7 23:34:30 点击：
553 you don't authenticate or the domain is not allowed relay
这个错误类型，跟前面的一篇文章，基本是一样的道理，可以参考一下前面的文章
- 上一篇：421 4.3.2 Service not available [2016-5-7]
- 下一篇：Recipient address rejected: Access denied [2016-5-7]