[0FD0:0008-102C] 2017-05-16 14:47:32 SMTP Server: 187-163-143-227.static.axtel
.net (187.163.143.227) connected
[0FD0:0008-102C] 2017-05-16 14:47:33 SMTP Server: Authentication failed for us
er bart ; connecting host 187.163.143.227
[0FD0:0008-102C] 2017-05-16 14:47:33 SMTP Server: 187-163-143-227.static.axtel
.net (187.163.143.227) disconnected. 0 message received
最近 server上一直在刷smtp的这个认证失败提示,认证的用户不是我们内部用户,这是受攻击了么?