13.228.81.133
ec2-13-228-81-133.ap-southeast-1.compute.amazonaws.com
18.138.84.197
ec2-18-138-84-197.ap-southeast-1.compute.amazonaws.com
54.169.156.74
ec2-54-169-156-74.ap-southeast-1.compute.amazonaws.com

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