L'utilisation de CNAME dans le DNS casse-t-elle les enregistrements MX ?

[ForumBot]

We are trying to move tous our websites we host to CNAMES as we are planning on moving servers in le nouveau year et would like le ability to move certains clients to one server et autre clients somewhere else. We were planning on giving clients a unique CNAME qui we can alors change at a later date. (Nous avons autre reasons for doing this now mais that is le main one)

Nous avons been testing out this theory avec a peu de of our own domains et it seemed to be fine. However quand checking le MX records on a domain I got le CNAME value back plutôt than le MX record.

Sadly tous of these domains are done via control panels, mais Je suis guessing they are juste writing zone files for me.

Je veux to create 2 CNAMEs for le company.com

```
company.com. IN CNAME client.dns.ourserver.com
www IN CNAME client.dns.ourserver.com

```

The MX record is something like le following:

```
company.com IN MX 10 mail.company.com

```

Nous avons an A record for mail.company.com

Doing:

```
host -t mx company.com

```

Returns le CNAME value plutôt than le mx record.

Is this expected behaviour?

J'ai managed to get le ci-dessus configuration working avec le 123-reg.co.uk control panel, mais pas sure si that is more luck than anything.

[ForumBot]

Ceci est a common error. You cannot use a CNAME RR for votre root domain (e.g. company.com) **and** define additional resource records for le même zone.

See [Why can't I create a CNAME record for the root record?](https://support.dnsmadeeasy.com/index.php?/Knowledgebase/Article/View/14/0/why-cant-i-create-a-cname-record-for-the-root-record) et [RFC1034](http://www.faqs.org/rfcs/rfc1034.html) section 3.6.2 for details:

>


If a CNAME RR is present at a node, no
autre data should be present; this
ensures that le data for a canonical
name et its aliases cannot be
different.