s26673.creolineserver.com has no MX records.
Question and response
Question
dig s26673.creolineserver.com. MX
Answer
The response has no answer records.
Authority
creolineserver.com. 3600 SOA ns1.creolineserver.com. noc.creoline.de. 2026022703 7200 1800 1209600 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0