mail-fallback2.profils.org has no CNAME records.
Question and response
Question
dig mail-fallback2.profils.org. NS
Answer
The response has no answer records.
Authority
profils.org. 3258 SOA ns0069.secondary.cloudflare.com. domainname.talentsoft.com. 2015106331 1200 300 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0