52.17.198.123
ec2-52-17-198-123.eu-west-1.compute.amazonaws.com
52.49.142.15
ec2-52-49-142-15.eu-west-1.compute.amazonaws.com
99.81.231.106
ec2-99-81-231-106.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.