34.249.120.72
ec2-34-249-120-72.eu-west-1.compute.amazonaws.com
34.250.77.249
ec2-34-250-77-249.eu-west-1.compute.amazonaws.com
54.77.154.238
ec2-54-77-154-238.eu-west-1.compute.amazonaws.com

za-smtp-inbound-1.mimecast.co.za.
za-smtp-inbound-2.mimecast.co.za.