On 03/16/2015 11:56 PM, Wes Hardaker wrote:
> This is fine:
>
> # dig lugod.org mx
>
> ;; ANSWER SECTION:
> lugod.org. 3600 IN MX 10 www.lugod.org.
>
> This is not:
>
> # dig www.lugod.org.
>
> ;; ANSWER SECTION:
> www.lugod.org. 3600 IN CNAME lugod.org.
> lugod.org. 3600 IN A 173.13.165.50
>
> *some* (most) DNS resolution software lets you get away with that, but
> it's not legal according to the DNS RFCs and shouldn't be done.
>
>
> The right thing to do would be to replace the MX record so it looked
> like this:
>
> lugod.org. 3600 IN MX 10 lugod.org.
>
> Which would then work. Though, the best thing to do is actually create
> a new host record:
>
> lugod.org. 3600 IN MX 10 mail.lugod.org.
> mail.lugod.org. 3600 IN A 173.13.165.50
>
In all the years of be being a Sys. Admin., this issue has been
very high on the problem list.
I have gotten to the point where I refuse to ever use a CNAME.
I wish that CNAME was never invented.
Tony
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