We are hosting the page of many of our customers. We want to be able to provide our customers with a subdomain of our own domain like customerpages.ourdomain.com so they can create a CNAME to this subdomain.
www.customer1.com CNAME customerpages.ourdomain.com. {This will work just fine.}
But the situation is I don't know if all our customers will be able to place the following CNAME
customer1.com CNAME customerpages.ourdomain.com
This last CNAME looks like it's against the RFC of DNS.
Any thoughts will be appreciated.