Dynamic DNS and cnames

[nickyboy]

"Ladislav Vobr" <lvobr at ies.etisalat.ae> wrote in message
news:bgnrh9$5ra$1 at sf1.isc.org...
> We are having customers with dynamic ip addresses running their services
> on dynamic IP addresses. We don't offer dynamic dns updates. Is there
> any other way customer can update his dns. The problem is like this.
> Customer has set up dynamic DNS service with some other DNS provider,
> having for example mail.dyn-dns.org be his mailserver and
> www.dyn-dns.org to be his web. My question is - on our dns servers
> customer has for example testdomain.ae configured  and he wants
> www.testdomain.ae and testdomain.ae to be a cname to his
> www.dyn-dns.org and mx record to be a cname to his mail.dyn-dns.org. As
> I know having cname for domain is not possible and having cname in MX
> record is not  correct as well, any way how to achieve this ?

I don't quite see the problem, you've allready come up with the solution...
I have a simular system for some of my clients....
They have client.dyn-dns.org and I simply have a CNAME record like so:

www.client.com CNAME client.dyn-dns.org
client.com           CNAME client.dyn-dns.org
client.com            MX        client.dyn-dns.org

The record client.dyn-dns.org is an A record to the IP of the server
client.dyn-dns.org    A   212.69.xxx.xxx

hth
nickyboy