44.235.238.139
ec2-44-235-238-139.us-west-2.compute.amazonaws.com
44.241.53.97
ec2-44-241-53-97.us-west-2.compute.amazonaws.com
54.68.84.216
ec2-54-68-84-216.us-west-2.compute.amazonaws.com

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