hera.jager-its.de has no MX records.
Question and response
Question
dig hera.jager-its.de. MX
Answer
The response has no answer records.
Authority
jager-its.de. 600 SOA ns81.domaincontrol.com. dns.jomax.net. 2026010500 28800 7200 604800 600
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0