3.248.10.10
ec2-3-248-10-10.eu-west-1.compute.amazonaws.com
34.242.39.197
ec2-34-242-39-197.eu-west-1.compute.amazonaws.com
52.213.108.192
ec2-52-213-108-192.eu-west-1.compute.amazonaws.com

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