ns2.iphh.de has no MX records.
Question and response
Question
dig ns2.iphh.de. MX
Answer
The response has no answer records.
Authority
iphh.de. 7200 SOA ns1.iphh.de. hostmaster.iphh.net. 2026012601 43200 7200 2419200 7200
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0