3.212.136.249
ec2-3-212-136-249.compute-1.amazonaws.com
52.71.20.125
ec2-52-71-20-125.compute-1.amazonaws.com

alt1.aspmx.l.google.com.
alt2.aspmx.l.google.com.
aspmx2.googlemail.com.
aspmx3.googlemail.com.
aspmx.l.google.com.
inbound-smtp.us-east-1.amazonaws.com.