mx0.lemis.com has no CNAME records.
Question and response
Question
dig mx0.lemis.com. NS
Answer
The response has no answer records.
Authority
lemis.com. 532 SOA ns1.lemis.com. grog.lemis.com. 2025113001 1800 3600 864000 7200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0