servers.etarget-emailing.com has no CNAME records.
Question and response
Question
dig servers.etarget-emailing.com. NS
Answer
The response has no answer records.
Authority
etarget-emailing.com. 300 SOA dns200.anycast.me. tech.ovh.net. 2026022200 86400 3600 3600000 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0