3.221.141.132
ec2-3-221-141-132.compute-1.amazonaws.com
34.194.151.153
ec2-34-194-151-153.compute-1.amazonaws.com
52.0.160.96
ec2-52-0-160-96.compute-1.amazonaws.com

mailstore1.secureserver.net.
smtp.secureserver.net.