35.160.181.220
ec2-35-160-181-220.us-west-2.compute.amazonaws.com
35.165.128.66
ec2-35-165-128-66.us-west-2.compute.amazonaws.com
35.81.10.15
ec2-35-81-10-15.us-west-2.compute.amazonaws.com

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