iP or domain name lookup

smtp.chinaemail.cn Server iP：

Current resolution：

domain resolution record：

2023-03-17-----2024-04-23 218.5.79.94

2017-08-31-----2023-02-27 218.5.74.238

2017-08-31-----2023-02-27 218.5.79.118

2020-02-05-----2023-02-27 211.152.37.195

2020-02-05-----2023-02-27 211.152.37.198

2020-02-05-----2023-02-27 211.152.37.197

2017-08-31-----2019-09-28 211.152.62.118

2017-08-31-----2019-09-28 211.152.62.117

2019-05-04-----2019-09-28 211.152.62.116