3.66.46.63
ec2-3-66-46-63.eu-central-1.compute.amazonaws.com
3.69.152.142
ec2-3-69-152-142.eu-central-1.compute.amazonaws.com
52.28.43.97
ec2-52-28-43-97.eu-central-1.compute.amazonaws.com

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