www.cyberfun.de has no MX records.
Question and response
Question
dig www.cyberfun.de. MX
Answer
The response has no answer records.
Authority
cyberfun.de. 86400 SOA ns1.sdt.net. hostmaster.sdt.net. 2023042501 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1680, xrcode 0, version 0, flags 0