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date: Tue, 4 Mar 2008 02:00:01 -0800,
group: microsoft.public.exchange.connectivity
back
Re: two countries one email domain
Responses inline.
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Bharat Suneja
MVP - Exchange
www.zenprise.com
NEW blog location:
exchangepedia.com/blog
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"georgestark" wrote in message
news:6016FD69-A9E9-45C9-A5B8-B411849CF129@microsoft.com...
> Guys hope you can help
> In the UK we have a front end exchange server which handles all email for
> mydoamind.com; email comes in and is delivered to the recipientâs mailbox
> server.
> We have just taken over a company in the US who need to be able to receive
> email for the same domain. We are going to create an Active directory sub
> domain to our internal domain in the US and add an exchange server. This
> exchange server will still be part of the UK exchange organisation. Some
> questions
> 1, how do multinational companies route email to different countries?
- If using a single namespace - domain.com - mail will come in to a single
location. Once it gets to Exchange, it knows how to route it to the server
where the recipient's mailbox resides by looking up the recipient in a
Global Catalog.
- Additional MX records may be added for servers in the same location or
other locations for redundancy. Such records have a higher preference
value - so those servers receive mail if the one(s) with a lower preference
isn't available.
- If using different namespaces (domain.com, domain.co.uk or uk.domain.com,
and so on.... ), you have MX records for each address space that can point
to the specific server(s) in a particular country or region.
> 2,Can we have another front end server with the same MX pref and split the
> email deliver between the two exchange servers?( Iâm guessing if youâre
> in
> the US the email will be delivered there as itâs a quicker lookup).
- In case of multiple MX records with the same preference, you can't really
determine where mail will be received - it will get distributed between both
locations, and you end up with the scenario of mail for UK recipients being
received by the US server which will then be routed to the UK server, and
vice versa.
- When returning MX records, DNS server does not have any way to find out
where the query is coming from, where the target of a MX server resides, and
which MX records to return. It returns all of them. Servers supporting
round-robin will change the order in which they appear in the response for
every query. The SMTP client uses the first one in the list.
> 3, or do we deliver all email to the UK and uses connectors to route email
> to the US users? (how do we separate emails for the US and UK.
> Bear in mind that everybody has to have the same email address e.g.
> me@mydomain.com.
- It is very common for the hq/main office to receive all mail. Once a
message gets to an Exchange server, it knows how to route to the recipient.
- If servers are in different Routing Groups, you do need Routing Group
Connectors both ways.
>
> I hope this makes sense.
>
> Warren
>
date: Wed, 5 Mar 2008 08:05:31 -0800
author: Bharat Suneja [MVP]
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