Apex domains cannot have CNAME records.
Postman
Domain verification
postman-domain-verification=70ac216c99eed16ef1cb98332ea6967b86468791f98b8b18e16ab8e93f4ec79605530ffddabe5de33625b6b6bf4936e06828a6d51544957a4455ef85e0e3fd0d
2a7c8eb765fa4ebeb4c27d578538ca43
_5nttgrrqvasdh4nrjys84uzap98usnz
f4d16010ff4e49f3a041aed5ed17a8ba
hubapi.com has no MX records.
jerry.ns.cloudflare.com
Cloudflare
yolanda.ns.cloudflare.com
Cloudflare
Zone apex
Start of authority
Email
Serial
2397356106
Refresh
2h 46m 40s
Retry
40m
Expire
7d
Negative cache TTL
30m