Routing incoming mail to another server   

Hi,

I have Exchange 2000 server.

How can I route incoming mail to another SMTP and to another port.

IOW

Our exchange configuration have several domain names. Now there
is one spesific domain name ( let's say routethis.fi ) I want to
route to another SMTP server and to non standard port.

So in DNS records we have

routethis.fi MX 10 mail.ourdomain.com

So all incoming mail to this domain is coming to our server...

I want to route all mail coming to this adress space to their SMTP server
(server.routethis.fi) port 60066?

How can I do this with Exchange?

PS. The problem of course here is that their ISP is blocking port 25

- Jari -

date: Mon, 3 Apr 2006 01:19:33 +0300   author:   Jari Sevon jari.sevon@code REMOVE_THIS block.fi

Re: Routing incoming mail to another server   

Caution: I am not an expert, just a piece of advice which
is open for discussion. :P

Let me rephrase the situation.
You have 2 servers namely MX1 and MX2.
MX1 is the one who receives all mail and MX2 is the one
with port 25 blocked.

I think...
You may create another SMTP virtual server in MX1 and
set the outgoing port to the port you desired(other then 25).
Then create a SMTP connector to have the new SMTP
virtual server to respond for address space you need.
Then in MX2, you have to set the port of the SMTP virtual
 server to the port you need.

Or...
you can have another easier(IMO) workaround(IMO)
without modifying Exchange settings. You may change the
 settings in the Firewall and use NAT to translate ports.
Say, create a tranlation rule so that any connections from MX1
to MX2 via port 25 is translated to port 2500. Then in the
firewall of MX2, you add the translation rule so that any
connections from MX1 to MX2 via port 2500 is translated to
25.

If both works, I prefer the later one as I don't want to change
 the default settings in Exchange and it's easy to fall back to
original settings.

Comments and discussions are welcomed.

Steven T

"Jari Sevon" <jari.sevon@code REMOVE_THIS block.fi> glsD:e0pill$79b$1@phys-news4.kolumbus.fi...
> Hi,
>
> I have Exchange 2000 server.
>
> How can I route incoming mail to another SMTP and to another port.
>
> IOW
>
> Our exchange configuration have several domain names. Now there
> is one spesific domain name ( let's say routethis.fi ) I want to
> route to another SMTP server and to non standard port.
>
> So in DNS records we have
>
> routethis.fi MX 10 mail.ourdomain.com
>
> So all incoming mail to this domain is coming to our server...
>
> I want to route all mail coming to this adress space to their SMTP server
> (server.routethis.fi) port 60066?
>
> How can I do this with Exchange?
>
> PS. The problem of course here is that their ISP is blocking port 25
>
> - Jari -
>

date: Mon, 3 Apr 2006 17:31:00 +0800   author:   Steven T

Re: Routing incoming mail to another server   

Steven,

> you can have another easier(IMO) workaround(IMO)
> without modifying Exchange settings. You may change the
> settings in the Firewall and use NAT to translate ports.
> Say, create a tranlation rule so that any connections from MX1
> to MX2 via port 25 is translated to port 2500. Then in the
> firewall of MX2, you add the translation rule so that any
> connections from MX1 to MX2 via port 2500 is translated to
> 25.

This won't work since I don't have access to MX1 outgoing firewall...

> You may create another SMTP virtual server in MX1 and
> set the outgoing port to the port you desired(other then 25).
> Then create a SMTP connector to have the new SMTP
> virtual server to respond for address space you need.
> Then in MX2, you have to set the port of the SMTP virtual
> server to the port you need.

I have already got it working somehow, but there still is problems
in incoming mail.

If mail to routethis.fi comes from outside of our Exchange organisation.
It is received by original SMTP Server on port 25, which is correct I think.
But it seems that wrong SMTP server (this original) is trying
to send it out also, because I am getting errors like this...

How can I make this new Virtual SMTP server to send it out, allthough it
is received by original one...

Second SMTP Connector is configured with lower cost. And with address space
routethis.fi. And this seems to be working since all email from our organisation
is routed correctly. Also "Allow messages to be relayed to these domains" is enabled.

For example I received error like this when I was truing to send email to
routethis.fi from yahoo....

From_: postmaster@ourdomain.com

This is an automatically generated Delivery Status Notification.

Unable to deliver message to the following recipients, due to being
unable to connect successfully to the destination mail server.

       Administrator@routethis.fi

date: Mon, 3 Apr 2006 15:58:04 +0300   author:   Jari Sevon jari.sevon@code REMOVE_THIS block.fi