"Oliver Moazzezi [MVP]" wrote:

> Hi,
>
> Inline.
>
>
> > OK, now I know between Exchange servers you can set up an internal relay
> > domain so two exchange servers in different Orgs can share a domain.  IE
> > if
> > the user is not found on server A try server B in the other Org before
> > sending an NDR if not found.
>
> Ok cool.
>
> > Now, is it possible to have an MX record point to Exchange 2007 and then
> > set
> > up an external relay for the domain but instead of the other system be an
> > Exchange server it is a completly non connected email system that is not
> > exchange and yet still do a domain shareing?
>
> Yes you can, they do not have to be Exchange Orgs, you can use other Mail
> systems.
>
> > I looked into it and there is the External relay domain in exchange but it
> > really is just a quick thing that does not say if the mailbox is not found
> > on
> > this server then relay to IP or sub domain.  I know I am missing some
> > steps
> > but want to make sure this is not just a pipe dream.
>
> If you the other Mail system is talking directly to the Hub Transport
> Servers, or if it is infact inside your LAN/Firewalls, then configure it as
> an Internal Relay. If this is an external system and you have Edge Servers
> also, configure as an External Relay domain (Edge Servers won't accept mail
> for Internal Relay domains).
>
> Oliver
>
>
>

"Oliver Moazzezi [MVP]" wrote:

>
> > It sort of sounded like an external relay would not first try to deliver
> > email to a mailbox on the mail server and then send to the other system if
> > one was not found.
>
> Hi,
>
> Both Internal and External relay will look internally for a matching address
> before passing the mail along to the external system. The difference being
> what I stated earlier.
>
> Hope that helps.
>
> Oliver
>
>
>
>