23.213.53.34
a23-213-53-34.deploy.static.akamaitechnologies.com
23.213.53.42
a23-213-53-42.deploy.static.akamaitechnologies.com

2600:1404:cc00:d::b81c:1db0
2600:1404:cc00:d::b81c:1db9

mx1.smartmail.dealer.com.
mx3.smartmail.dealer.com.
spamblock.dealer.com.