delta.fei.stuba.sk has no MX records.
Question and response
Question
dig delta.fei.stuba.sk. MX
Answer
The response has no answer records.
Authority
fei.stuba.sk. 86400 SOA ns.fei.stuba.sk. hostmaster.fei.stuba.sk. 2026022501 14400 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0