mail.alt255.eu has no MX records.
Question and response
Question
dig mail.alt255.eu. MX
Answer
The response has no answer records.
Authority
alt255.eu. 900 SOA kiki.bunny.net. hostmaster.bunny.net. 2021704912 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0