34.211.174.18
ec2-34-211-174-18.us-west-2.compute.amazonaws.com
34.214.111.254
ec2-34-214-111-254.us-west-2.compute.amazonaws.com
52.32.119.60
ec2-52-32-119-60.us-west-2.compute.amazonaws.com

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