Exchange 2003 - mail routing

[Tomek]

Hi all,

I have one question regarding the outgoing email routing in exchange
authorative and nonauthorative domains. As i understand - if Exchange
is authorative for exemplary domain all mails are routed imn following
manner: Exchnage 1st checks the AD, if no email is found it check the
SMTP connector and as last method it is using DNS to send the email,
right?. How does it look for nonauthorative domain? does exchange
check the AD as well, then STMP connector and uses DNS at the end?

What will happen if I will set two domains in recipient policy
(exchange 2k3 SP2 on sbs 2k3) - @abc.com as authorative and @zxc.com
as nonauthorative, set the SMTP connector to route all mails for
@zxc.com to smart host and send email to an existing email address in
exchange for domain @zxc.com - will it be forwarded to smart host or
routed directly to to user's mailbox without leaving exchange ?

Thanks,
Tomek

[Bharat Suneja [MVP]]

External mail system = any mail system external to your Exchange
Organization (can be another Exchange Org, or a non-Exchange mail system
internal or external)

1) For non-authoritative domains, you setup SMTP Connector to deliver mail
for shared address space (for which local recipients do not exist) to
another mail host. Described in method 1 in KBA 321721.

How to share an SMTP address space in Exchange 2000 Server or in Exchange
Server 2003
http://support.microsoft.com/kb/321721

2) For authoritative domains, Exchange needs to have a recipient.
- Recipients in the external mail system have a different email address
(@foo.com).
- You create Contacts (or mail-enabled users) for them in Exchange using a
directory synchronization utility/script/other tool. The @foo.com goes in
the targetAddress attribute of those recipients.
- Recipient Policies in Exchange generate email addresses @YourDomain.com as
primary (and any additional proxyAddresses, if required or existing in that
Recipient Policy).
- Covered by Method 2 in KBA 321721.

- For authoritative domains, if Exchange does not find a recipient it will
(and should) generate a NDR.
- For non-authoritative domains, Exchange is not responsible for generating
a NDR. For such domains, it should have a path to forward mail to.

Also look at:
XADM: How to Set Up Centralized SMTP Domain Sharing in Exchange 2000 Server
for Independent Organizations
http://support.microsoft.com/kb/315511
--
Bharat Suneja
MVP - Exchange
www.zenprise.com
NEW blog location:
exchangepedia.com/blog
----------------------------

"Tomek" <tozajac...@gmail.com> wrote in message
news:24bf2f21-b48c-4ae0...@c33g2000hsd.googlegroups.com...