[RFCI-Discuss] about CNAME (was Re: RFCI-Discuss Digest, Vol 38, Issue 2)

[Alan Brown]

On Thu, 9 Mar 2006, Jeff Pang wrote:

> Thank you,Paul,you are pretty kind.
>
> In fact we have aliased netease domains's MX records to other A
> records.Why we need to do it?I'd describe it below.

This will fail to resolve for any site where the DNS servers have been
set to strict enforcement of RFCs.

Additionally, puting CNAMEs to systems outside your control is risky at
best and downright foolhardy a lot of the time - mainly because you have
absolutely no control whether such entries would suddenly cease to
resolve, or suddenly change to 127.0.0.1 or similar madness.


-- 
      If a person, or organisation, starts to play on your fears
      it may be that person or organisation that you should fear.