mail-node2.jotelulu.com has no CNAME records.
Question and response
Question
dig mail-node2.jotelulu.com. NS
Answer
The response has no answer records.
Authority
jotelulu.com. 2845 SOA ns1.adderglobal.com. admin.adderglobal.com. 2026021800 28800 7200 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0