mail.buzo.eu has no MX records.
Question and response
Question
dig mail.buzo.eu. MX
Answer
The response has no answer records.
Authority
buzo.eu. 7200 SOA ns1.your-server.de. postmaster.your-server.de. 2026011500 86400 10800 3600000 7200
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0