multiple mail servers for one domain

[Daniel C.]

On Thu, May 14, 2009 at 2:01 PM, William Atteood <wattwood at gmail.com> wrote:
> Yes.  Setup a second mx say mail2.domain.com

Won't this result in mail2.domain.com randomly getting emails for
accounts that should go to mail1.domain.com?  It's my understanding
that, while mail is *supposed* to be delivered to the MX records in
order, it doesn't always happen that way, and that it's acceptable to
deliver mail to any MX record for the domain.

Practical upshot being, is it possible to make a non-MX DNS record and
tell gmail to forward them to it?  If it is, this would prevent other
mail systems from accidentally sending mail to the secondary server on
accident.  But Gmail may only be happy with forwarding mail to MX
records.

-Dan