mx1.jotelulu.com has no CNAME records.
Question and response
Question
dig mx1.jotelulu.com. NS
Answer
The response has no answer records.
Authority
jotelulu.com. 39 SOA ns1.adderglobal.com. admin.adderglobal.com. 2026022600 28800 7200 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0