BIND 9.6 Flaw - CNAME vs. A Record in MX Records are NOT "Illegal"

[Al Stu]

RFC 974:
"There is one other special case.  If the response contains an answer which
is a CNAME RR, it indicates that REMOTE is actually an alias for some other
domain name. The query should be repeated with the canonical domain name."


----- Original Message ----- 
From: "Scott Haneda" <talklists at newgeo.com>
To: "Al Stu" <Al_Stu at Verizon.net>
Cc: <bind-users at lists.isc.org>
Sent: Monday, January 26, 2009 8:09 PM
Subject: Re: BIND 9.6 Flaw - CNAME vs. A Record in MX Records are NOT 
"Illegal"


> On Jan 26, 2009, at 7:54 PM, Al Stu wrote:
>
>> If you refuse a CNAME then it is your SMTP server that is broken.   The 
>> SMTP RFC's clearly state that SMTP servers are to accept and  lookup a 
>> CNAME.
>
>
> [RFC974] explicitly states that MX records shall not point to an alias 
> defined by a CNAME.  That is what I was talking about, are you saying 
> this is not correct?  As this is what I was under the impression for 
> quite some time.
> --
> Scott
>