On 5/27/15 8:33 PM, Don Fanning wrote:
(Please trim inclusions from previous messages)
RFC5321 in Section 5 [http://tools.ietf.org/html/rfc5321#section-5]
states:
"The lookup first attempts to locate an MX record associated with the
name. If
a CNAME record is found, the resulting name is processed as if it were the initial name.*"*
This means if the lookup for www.example.com. returns CNAME example.com, it will use the MX records under example.com., not anything under the CNAME record www.example.com.
That is not true at all. The previous paragraph states that it must process the entire FQDN and not many any inferences as to the domain's relationship with the FQDN.
I'd like to try it out then, as I'm certain this doesn't work that way in most resolvers for MX's. I've run into it before even.