mail.MultaCOM.com has no CNAME records.
Question and response
Question
dig mail.MultaCOM.com. NS
Answer
The response has no answer records.
Authority
multacom.com. 1170 SOA ns2.multacom.com. webmaster.multacom.com. 2025082901 43200 900 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0