34.193.5.52
ec2-34-193-5-52.compute-1.amazonaws.com
52.45.140.96
ec2-52-45-140-96.compute-1.amazonaws.com
52.70.79.175
ec2-52-70-79-175.compute-1.amazonaws.com

east.smtp.mx.exch092.serverdata.net.
west.smtp.mx.exch092.serverdata.net.