52.0.147.6
ec2-52-0-147-6.compute-1.amazonaws.com
54.146.188.100
ec2-54-146-188-100.compute-1.amazonaws.com

alt1.aspmx.l.google.com.
alt2.aspmx.l.google.com.
aspmx2.googlemail.com.
aspmx3.googlemail.com.
aspmx4.googlemail.com.
aspmx5.googlemail.com.
aspmx.l.google.com.