ntp2.wup-de.hosts.301-moved.de has no MX records.
Question and response
Question
dig ntp2.wup-de.hosts.301-moved.de. MX
Answer
The response has no answer records.
Authority
hosts.301-moved.de. 120 SOA dns-a.301-moved.de. dnsmaster.301-moved.de. 2026022601 10800 3600 1814400 600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0