23.73.0.52
a23-73-0-52.deploy.static.akamaitechnologies.com
23.73.0.56
a23-73-0-56.deploy.static.akamaitechnologies.com

2a02:26f0:1180:33::210:657
2a02:26f0:1180:33::210:662

mx1-eu.spamexperts.com.
mx2-eu.spamexperts.com.
mx3-eu.spamexperts.com.
mx4-eu.spamexperts.com.