dns03.ybaca.net has no MX records.
Question and response
Question
dig dns.aws.ybaca.sk. MX
Answer
The response has no answer records.
Authority
ybaca.sk. 3600 SOA ns01.ybaca.net. hostmaster.ybaca.net. 2025090101 28800 2048 1048576 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0