mcn-ext-dns-2.materna.de has no MX records.
Question and response
Question
dig mcn-ext-dns-2.materna.de. MX
Answer
The response has no answer records.
Authority
materna.de. 3600 SOA rigel.materna.de. hostmaster.materna.de. 2026022601 3600 7200 2592000 3600
Additional
. 0 OPT ; payload 1400, xrcode 0, version 0, flags 0