mail.fu110.de has no MX records.
Question and response
Question
dig mail.fu110.de. MX
Answer
The response has no answer records.
Authority
fu110.de. 3600 SOA dns13.ovh.net. tech.ovh.net. 2026021701 86400 3600 3600000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0