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Exchange Server 2003 and cable modem question...

Posted on 2004-10-09
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Last Modified: 2012-05-05
Ok...I am about to set up a network for a very small company with a very limited budget.  I am going to deploy Small Business Server 2003 and XP Pro.  

Currently the company has a website(example.com) that is hosted by an external hosting company and retrieve their emails through the hosting company.  They access the internet via dial-up modem.  When I upgrade their network, they want to go to a cable modem from a local ISP.  

I need their internal Exchange Server to be able to retrieve emails that are sent to user@example.com.  How would I do this?  Is this recommended since cable modems change their IPs every so often?  
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Question by:daveyd123
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scampgb earned 500 total points
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Hi daveyd123,

I assume that you're currently picking up the mail from the hosting company with POP3?

You have a couple of options here - continue to use POP3 (but get the Exchange server to do it), or move to SMTP mail delivery.

POP3 option
This will be the easiest in your circumstances.  You configure the Exchange server to collect email from your hosting company using POP3.
Note that this is not the "technically ideal" solution, and only works with SBS.  If you upgrade to the full version of Exchange later, you'll have to do the SMTP work (or use a third-party POP3 collector).
You can find some info on setting this up at : http://searchexchange.techtarget.com/ateQuestionNResponse/0,289625,sid43_cid576802_tax295935,00.html

SMTP option - direct delivery
This is where servers on the Internet contact your SBS machine directly in order to deliver mail.
You need to set the "MX" record for your Internet domain to point to the IP address of this machine (well, technically the name of it)
You may have a problem with this if your IP address is often changing.  In which case you could use a service like DynDNS - http://www.dyndns.org/services/dyndns/
If you're going this route, it would be worthwhile talking to your ISP to see if they'll be a "secondary MX".  This means that they'll queue email for you in the event of a problem with your server / Internet connection.


SMTP option - external queue
This is where your ISP (or other hosting provider) receives mail and queues it for you.
Your Exchange server is then configured to contact the ISP's mail server and issue an "ETRN" command.  This is similar to the POP3 example above.

Incidentally, there's a handy article on setting up SBS at http://www.msexchange.org/tutorials/Installing-and-Configuring-SBS2003.html

Does that help?
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by:daveyd123
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Great info...Thanks!!!
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by:scampgb
ID: 12277542
Glad I could help - good luck with the project :-)
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