52.17.243.249
ec2-52-17-243-249.eu-west-1.compute.amazonaws.com
52.30.141.183
ec2-52-30-141-183.eu-west-1.compute.amazonaws.com
54.154.117.171
ec2-54-154-117-171.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.