34.215.6.145
ec2-34-215-6-145.us-west-2.compute.amazonaws.com
44.231.3.71
ec2-44-231-3-71.us-west-2.compute.amazonaws.com
52.26.183.71
ec2-52-26-183-71.us-west-2.compute.amazonaws.com

alt1.aspmx.l.google.com.
aspmx2.googlemail.com.
aspmx.l.google.com.
spmx3.googlemail.com.