mail.rz1.dbv.eu has no MX records.
Question and response
Question
dig mail.rz1.dbv.eu. MX
Answer
The response has no answer records.
Authority
rz1.dbv.eu. 180 SOA dns.rz1.dbv.eu. it.dbv.eu. 2021060000 10800 3600 604800 180
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0