my.yu.net has no MX records.
Question and response
Question
dig my.yu.net. MX
Answer
The response has no answer records.
Authority
yu.net. 1800 SOA ns1.yu.net. hostmaster.yu.net. 2025122402 300 300 604800 1800
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0