52.17.144.193
ec2-52-17-144-193.eu-west-1.compute.amazonaws.com
52.17.208.179
ec2-52-17-208-179.eu-west-1.compute.amazonaws.com
52.30.200.138
ec2-52-30-200-138.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.