3.233.72.57
ec2-3-233-72-57.compute-1.amazonaws.com
44.193.122.78
ec2-44-193-122-78.compute-1.amazonaws.com
52.55.242.91
ec2-52-55-242-91.compute-1.amazonaws.com

alt1.aspmx.l.google.com.
alt2.aspmx.l.google.com.
aspmx2.googlemail.com.
aspmx3.googlemail.com.