52.17.220.219
ec2-52-17-220-219.eu-west-1.compute.amazonaws.com
52.214.157.137
ec2-52-214-157-137.eu-west-1.compute.amazonaws.com
54.77.97.176
ec2-54-77-97-176.eu-west-1.compute.amazonaws.com

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