54.207.64.11
ec2-54-207-64-11.sa-east-1.compute.amazonaws.com
54.94.104.189
ec2-54-94-104-189.sa-east-1.compute.amazonaws.com
54.94.181.161
ec2-54-94-181-161.sa-east-1.compute.amazonaws.com

cluster1a.us.messagelabs.com.
cluster1.us.messagelabs.com.