Adding CNAME for the root domain issue
johnl at iecc.com
Wed Apr 27 13:56:27 UTC 2016
Assuming you mean this (notice the dots):
Domain.com. CNAME x.y.com.
www CNAME x.y.com.
it should work. Some people believe that you can't have other records
at names below a name with a CNAME, but they are mistaken.
On the other hand, this will not work.
domain.com. CNAME x.y.com.
domain.com. MX 10 server.somewhere
To make this work, you need Stephane's hack of copying the A and AAAA records.
More information about the bind-users