mx.meis.space has no CNAME records.
Question and response
Question
dig mx.meis.space. NS
Answer
The response has no answer records.
Authority
meis.space. 3600 SOA dns.meis.space.meis.space. info.meis.space. 1764007225 180 120 3600000 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0