18.231.91.255
ec2-18-231-91-255.sa-east-1.compute.amazonaws.com
52.67.123.5
ec2-52-67-123-5.sa-east-1.compute.amazonaws.com
54.233.159.223
ec2-54-233-159-223.sa-east-1.compute.amazonaws.com

alt2.aspmx.l.google.com.
aspmx2.googlemail.com.
aspmx3.googlemail.com.
aspmx.l.google.com.
lt1.aspmx.l.google.com.