18.65.200.107
18.65.200.114
18.65.200.47
server-18-65-200-47.nrt57.r.cloudfront.net
18.65.200.68
server-18-65-200-68.nrt57.r.cloudfront.net

2600:9000:2138:5000:0:67db:9cc0:93a1
2600:9000:2138:5400:0:67db:9cc0:93a1
2600:9000:2138:7800:0:67db:9cc0:93a1
2600:9000:2138:8c00:0:67db:9cc0:93a1
2600:9000:2138:9a00:0:67db:9cc0:93a1
2600:9000:2138:e000:0:67db:9cc0:93a1
2600:9000:2138:e800:0:67db:9cc0:93a1
2600:9000:2138:ee00:0:67db:9cc0:93a1

inbound-smtp.us-east-1.amazonaws.com.