mail.eu.clara.net has no MX records.
Question and response
Question
dig mail.eu.clara.net. MX
Answer
The response has no answer records.
Authority
mail.eu.clara.net. 18000 SOA ns0.clara.net. hostmaster.clara.net. 2021050509 172800 3600 1728000 172800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0