3.229.6.164
ec2-3-229-6-164.compute-1.amazonaws.com
52.203.53.149
ec2-52-203-53-149.compute-1.amazonaws.com
52.6.214.198
ec2-52-6-214-198.compute-1.amazonaws.com
54.161.244.243
ec2-54-161-244-243.compute-1.amazonaws.com

mail1.wcentrix.net.
mail2.wcentrix.net.
mail.wcentrix.net.