mail4.elmu.hu has no MX records.
Question and response
Question
dig mail4.elmu.hu. MX
Answer
The response has no answer records.
Authority
elmu.hu. 3600 SOA global1.eondns.net. domainmaster.eon.com. 2026022300 10000 1800 604800 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0