3.210.81.181
ec2-3-210-81-181.compute-1.amazonaws.com
35.174.237.175
ec2-35-174-237-175.compute-1.amazonaws.com
52.200.100.193
ec2-52-200-100-193.compute-1.amazonaws.com
52.206.121.237
ec2-52-206-121-237.compute-1.amazonaws.com

2600:1f18:6431:3a64:5708:7edc:fe74:3942
2600:1f18:6431:3a68:89bb:fe95:97ee:dcc5
2600:1f18:6431:3a72:2a1d:edaf:e30f:4c33
2600:1f18:6431:3a76:3295:149a:6c8a:258

us-smtp-inbound-1.mimecast.com.
us-smtp-inbound-2.mimecast.com.