52.17.137.207
ec2-52-17-137-207.eu-west-1.compute.amazonaws.com
52.17.89.120
ec2-52-17-89-120.eu-west-1.compute.amazonaws.com
52.214.151.251
ec2-52-214-151-251.eu-west-1.compute.amazonaws.com

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