Exchange in Child Domain - SMTP receipt/delivery?

Hi

I hope someone can provide me with some clarity on the following:

I have installed a second Exchange server in a child domain of our parent 
(forest root) domain on a remote site, connected by a WAN/LAN link. Currently 
all servers are in the same routing group in the same organisation, and 
everything appears fine. The servers are all present and manageable in the 
Exchange System Manager and users on one mailbox server can email users on 
the other mailbox server no problem. (We are also going to install a 
Front-End for OWA access). We could configure a routing group between the 
sites but currently this does not seem to be necessary.

Having only ever used single servers, I need some guidance as to how the 
external send/receive will take place for SMTP for the two servers. I want 
all the mail to be sent through the INternet gateway of the parent domain 
where the MX record currently has its endpoint in the firewall. How do I go 
about ensuring that when mail is received at the firewall that the 
appropriate mailbox receives the mail? Or should Exchange sort this out by 
itself using the Directory lookup (there is a GC on both sites).

I also want to provide proxy server access for users in the child domain on 
the remote site using an Internet connection on that site (also protected via 
firewall). If the default gateway for the child subnet is that of the (local) 
firewall, then Exchange tries to route out using that gateway. The DNS server 
on the child domain uses ISP forwarders to complete the resolution of 
external addresses, through the local internet gateway and firewall.

Is there a method to ensure that the Exchange Server uses the WAN link to 
route its mail out and resolves its external DNS without intefrering with 
other outbound traffic?

Any help much appreciated as a bit confused!

0
6/23/2006 3:06:02 PM
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You'll want to create an SMTP connector to ensure that outbound mail
routes correctly. I'd suggest using your current Exchange server as the
bridgehead and this will mean that routing will continue as it does
now. Inbound mail should be handled transparently by Exchange in your
current configuration.

Nue
blueboy1894 wrote:
> Hi
>
> I hope someone can provide me with some clarity on the following:
>
> I have installed a second Exchange server in a child domain of our parent
> (forest root) domain on a remote site, connected by a WAN/LAN link. Currently
> all servers are in the same routing group in the same organisation, and
> everything appears fine. The servers are all present and manageable in the
> Exchange System Manager and users on one mailbox server can email users on
> the other mailbox server no problem. (We are also going to install a
> Front-End for OWA access). We could configure a routing group between the
> sites but currently this does not seem to be necessary.
>
> Having only ever used single servers, I need some guidance as to how the
> external send/receive will take place for SMTP for the two servers. I want
> all the mail to be sent through the INternet gateway of the parent domain
> where the MX record currently has its endpoint in the firewall. How do I go
> about ensuring that when mail is received at the firewall that the
> appropriate mailbox receives the mail? Or should Exchange sort this out by
> itself using the Directory lookup (there is a GC on both sites).
>
> I also want to provide proxy server access for users in the child domain on
> the remote site using an Internet connection on that site (also protected via
> firewall). If the default gateway for the child subnet is that of the (local)
> firewall, then Exchange tries to route out using that gateway. The DNS server
> on the child domain uses ISP forwarders to complete the resolution of
> external addresses, through the local internet gateway and firewall.
>
> Is there a method to ensure that the Exchange Server uses the WAN link to
> route its mail out and resolves its external DNS without intefrering with
> other outbound traffic?
> 
> Any help much appreciated as a bit confused!

0
imaneophyte (3004)
6/23/2006 3:21:12 PM
Hi Nue.

This looks good, thanks for the info. I've been racking my brians about this 
one for ages. Will post any problems here.

Regards

"Nue" wrote:

> You'll want to create an SMTP connector to ensure that outbound mail
> routes correctly. I'd suggest using your current Exchange server as the
> bridgehead and this will mean that routing will continue as it does
> now. Inbound mail should be handled transparently by Exchange in your
> current configuration.
> 
> Nue
> blueboy1894 wrote:
> > Hi
> >
> > I hope someone can provide me with some clarity on the following:
> >
> > I have installed a second Exchange server in a child domain of our parent
> > (forest root) domain on a remote site, connected by a WAN/LAN link. Currently
> > all servers are in the same routing group in the same organisation, and
> > everything appears fine. The servers are all present and manageable in the
> > Exchange System Manager and users on one mailbox server can email users on
> > the other mailbox server no problem. (We are also going to install a
> > Front-End for OWA access). We could configure a routing group between the
> > sites but currently this does not seem to be necessary.
> >
> > Having only ever used single servers, I need some guidance as to how the
> > external send/receive will take place for SMTP for the two servers. I want
> > all the mail to be sent through the INternet gateway of the parent domain
> > where the MX record currently has its endpoint in the firewall. How do I go
> > about ensuring that when mail is received at the firewall that the
> > appropriate mailbox receives the mail? Or should Exchange sort this out by
> > itself using the Directory lookup (there is a GC on both sites).
> >
> > I also want to provide proxy server access for users in the child domain on
> > the remote site using an Internet connection on that site (also protected via
> > firewall). If the default gateway for the child subnet is that of the (local)
> > firewall, then Exchange tries to route out using that gateway. The DNS server
> > on the child domain uses ISP forwarders to complete the resolution of
> > external addresses, through the local internet gateway and firewall.
> >
> > Is there a method to ensure that the Exchange Server uses the WAN link to
> > route its mail out and resolves its external DNS without intefrering with
> > other outbound traffic?
> > 
> > Any help much appreciated as a bit confused!
> 
> 
0
6/23/2006 3:52:02 PM
Just a quick question - when we add the FE would we then specify all the 
address of this server as the smarthost if we wanted all SMTP to be handled 
by that server, and presumably we would place the FE address in the SMTP NAT 
rule of the firewall?

"blueboy1894" wrote:

> Hi Nue.
> 
> This looks good, thanks for the info. I've been racking my brians about this 
> one for ages. Will post any problems here.
> 
> Regards
> 
> "Nue" wrote:
> 
> > You'll want to create an SMTP connector to ensure that outbound mail
> > routes correctly. I'd suggest using your current Exchange server as the
> > bridgehead and this will mean that routing will continue as it does
> > now. Inbound mail should be handled transparently by Exchange in your
> > current configuration.
> > 
> > Nue
> > blueboy1894 wrote:
> > > Hi
> > >
> > > I hope someone can provide me with some clarity on the following:
> > >
> > > I have installed a second Exchange server in a child domain of our parent
> > > (forest root) domain on a remote site, connected by a WAN/LAN link. Currently
> > > all servers are in the same routing group in the same organisation, and
> > > everything appears fine. The servers are all present and manageable in the
> > > Exchange System Manager and users on one mailbox server can email users on
> > > the other mailbox server no problem. (We are also going to install a
> > > Front-End for OWA access). We could configure a routing group between the
> > > sites but currently this does not seem to be necessary.
> > >
> > > Having only ever used single servers, I need some guidance as to how the
> > > external send/receive will take place for SMTP for the two servers. I want
> > > all the mail to be sent through the INternet gateway of the parent domain
> > > where the MX record currently has its endpoint in the firewall. How do I go
> > > about ensuring that when mail is received at the firewall that the
> > > appropriate mailbox receives the mail? Or should Exchange sort this out by
> > > itself using the Directory lookup (there is a GC on both sites).
> > >
> > > I also want to provide proxy server access for users in the child domain on
> > > the remote site using an Internet connection on that site (also protected via
> > > firewall). If the default gateway for the child subnet is that of the (local)
> > > firewall, then Exchange tries to route out using that gateway. The DNS server
> > > on the child domain uses ISP forwarders to complete the resolution of
> > > external addresses, through the local internet gateway and firewall.
> > >
> > > Is there a method to ensure that the Exchange Server uses the WAN link to
> > > route its mail out and resolves its external DNS without intefrering with
> > > other outbound traffic?
> > > 
> > > Any help much appreciated as a bit confused!
> > 
> > 
0
6/23/2006 8:45:02 PM
Blue,

When you setup the SMTP connector you can specify the FE as the bridgehead 
server and have it handle all the * address space.  Yes you could then setup 
the NAT translation on your firewall to point to the IP address of the front 
end server to handle all your SMTP traffic.  I hope this helps.

Regards,
Mark

"blueboy1894" wrote:

> Just a quick question - when we add the FE would we then specify all the 
> address of this server as the smarthost if we wanted all SMTP to be handled 
> by that server, and presumably we would place the FE address in the SMTP NAT 
> rule of the firewall?
> 
> "blueboy1894" wrote:
> 
> > Hi Nue.
> > 
> > This looks good, thanks for the info. I've been racking my brians about this 
> > one for ages. Will post any problems here.
> > 
> > Regards
> > 
> > "Nue" wrote:
> > 
> > > You'll want to create an SMTP connector to ensure that outbound mail
> > > routes correctly. I'd suggest using your current Exchange server as the
> > > bridgehead and this will mean that routing will continue as it does
> > > now. Inbound mail should be handled transparently by Exchange in your
> > > current configuration.
> > > 
> > > Nue
> > > blueboy1894 wrote:
> > > > Hi
> > > >
> > > > I hope someone can provide me with some clarity on the following:
> > > >
> > > > I have installed a second Exchange server in a child domain of our parent
> > > > (forest root) domain on a remote site, connected by a WAN/LAN link. Currently
> > > > all servers are in the same routing group in the same organisation, and
> > > > everything appears fine. The servers are all present and manageable in the
> > > > Exchange System Manager and users on one mailbox server can email users on
> > > > the other mailbox server no problem. (We are also going to install a
> > > > Front-End for OWA access). We could configure a routing group between the
> > > > sites but currently this does not seem to be necessary.
> > > >
> > > > Having only ever used single servers, I need some guidance as to how the
> > > > external send/receive will take place for SMTP for the two servers. I want
> > > > all the mail to be sent through the INternet gateway of the parent domain
> > > > where the MX record currently has its endpoint in the firewall. How do I go
> > > > about ensuring that when mail is received at the firewall that the
> > > > appropriate mailbox receives the mail? Or should Exchange sort this out by
> > > > itself using the Directory lookup (there is a GC on both sites).
> > > >
> > > > I also want to provide proxy server access for users in the child domain on
> > > > the remote site using an Internet connection on that site (also protected via
> > > > firewall). If the default gateway for the child subnet is that of the (local)
> > > > firewall, then Exchange tries to route out using that gateway. The DNS server
> > > > on the child domain uses ISP forwarders to complete the resolution of
> > > > external addresses, through the local internet gateway and firewall.
> > > >
> > > > Is there a method to ensure that the Exchange Server uses the WAN link to
> > > > route its mail out and resolves its external DNS without intefrering with
> > > > other outbound traffic?
> > > > 
> > > > Any help much appreciated as a bit confused!
> > > 
> > > 
0
6/24/2006 2:19:01 AM
Reply:

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