34.223.134.168
ec2-34-223-134-168.us-west-2.compute.amazonaws.com
35.162.132.236
ec2-35-162-132-236.us-west-2.compute.amazonaws.com
35.167.72.135
ec2-35-167-72-135.us-west-2.compute.amazonaws.com

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