Re: about oracle.com MX ?

Question seems to be more of a mail question than DNS... but since that is
what I do thought I'd answer.

I think that you are assuming that the SMTP server and the POP server are
the same host. This isn't always true. Especially if you have a large
enterprise with multiple locations.

Most likely these hosts are simpy "relays" to their internal mail systems.

With the priority the same, the sending smtp host will just pick one-
usually at random. If that fails they will (should) try the other hosts.

Corin

"SB CH" <chulmin2@hotmail.com> wrote in message
news:bemtk8$1k2c$1@sf1.isc.org...
> Hello, all.
>
> I have one question about the MX of the DNS.
> When I dig oracle.com mx like this,
> # dig @ns1.oracle.com. oracle.com mx
> the result is below.
>
> oracle.com. 3H IN MX 200 inet-mail4.oracle.com.
> oracle.com. 3H IN MX 200 inet-mail1.oracle.com.
> oracle.com. 3H IN MX 200 inet-mail2.oracle.com.
> oracle.com. 3H IN MX 200 inet-mail3.oracle.com.
>
> as you know the MX priority is alike all.
> the result of the intel.com, microsoft.com is alike.
>
> I would like to know the theory of the Mail eXchange when the MX priority
> is same.
> How they can share the mailboxes between other servers?
> What is the pop server between them?
> Surely, I know the MX theory when the MX priority is different.
>
>
> Thanks in advance.