3.64.101.139
ec2-3-64-101-139.eu-central-1.compute.amazonaws.com
3.65.95.226
ec2-3-65-95-226.eu-central-1.compute.amazonaws.com

alt1.aspmx.l.google.com.
alt2.aspmx.l.google.com.
alt3.aspmx.l.google.com.
alt4.aspmx.l.google.com.
aspmx.l.google.com.
mx.yandex.net.
smtp.sendgrid.everytale.net.