bb.exicon.sk has no MX records.
Question and response
Question
dig bb.exicon.sk. MX
Answer
The response has no answer records.
Authority
exicon.sk. 3600 SOA ns1.nameserver.sk. root.dnsbackup.net. 2026021202 28800 7200 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0