smtp.kraemer-it.de has no NS records.
NS records for this zone are defined at kraemer-it.de.
NS records for this zone are defined at kraemer-it.de.
Question and response
Question
dig smtp.kraemer-it.de. NS
Answer
The response has no answer records.
Authority
kraemer-it.de. 3600 SOA ns01.kraemer-it.cloud. rechenzentrum.kraemer-it.de. 2026031601 7200 540 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0