Apex domains cannot have CNAME records.
Question and response
Question
dig namebay.email. NS
Answer
namebay.email. 1 NS dns2.namebay.com.
namebay.email. 1 NS dns1.namebay.com.
Authority
The response has no authority records.
Additional
dns1.namebay.com. 4 A 62.141.38.216
dns1.namebay.com. 4 A 185.65.56.133
dns2.namebay.com. 4 A 91.134.185.34
dns2.namebay.com. 4 A 185.65.56.134
dns1.namebay.com. 4 AAAA 2001:4ba0:cafe:532:0:0:0:1
dns1.namebay.com. 4 AAAA 2a01:c8:ff00:201:0:0:0:133
dns2.namebay.com. 4 AAAA 2001:41d0:203:ddee:0:0:0:34
dns2.namebay.com. 4 AAAA 2a01:c8:ff00:201:0:0:0:134
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0