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Internal SMTP server forwarding to my Exchange Server 2003

Posted on 2008-06-17
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Last Modified: 2013-11-30
Hi Experts,

I have an Exchange 2003 server on another subnet that I need to route some SMTP traffic to from my local subnet.  I have a web server on local subnet with  route set to the outside interface so I can't route from 10.1.3.30 to 192.168.200.21, because my default route is set to go to the Internet for traffic.  My Exchange server used to be local, but now it's moved.  I have an ASP job on the web server that sends SMTP mail to my Exhcange internally, but this no longer will work due to the gateway change.

I've decided to build a local IIS SMTP server on my local subnet, but not sure what my next steps should be.  SMTP is installed on a server that is on the 10.1.x.x and it can route just fine to 192.168.200.21.  Any help in getting IIS SMTP to 'forward' or relay the mail to Exchange would be appreciated.
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Question by:eggm4n
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Matthew Millers earned 2000 total points
ID: 21807392
Hi,

Open the IIS Manager
Exchange the SMTP branch
Right click on domain > new > domain
Type = remote
Enter the domain to route mail for

Open the new remote domain
Change the option in section "route domain" to smart host and specify your exchange server
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by:eggm4n
ID: 21807524
perfect thanks mattee76.  Also I needed to add the local SMTP server IP address as an approved relay.
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by:eggm4n
ID: 31468134
Hi!  Thanks for the help.  It did take me a few seconds to understand that you meant expand instead of Exchange the SMTP tab.  I bet you have Exchange on the brain.
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