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Switching ISPs and SMTP settings on Exchange Server 2000

Posted on 2007-11-20
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Last Modified: 2013-12-05
I have a server that's been set up on Exchange on Windows Server 2000. We are switching ISPs tomorrow (still have a static IP, but are switching from DSL to Cable) and I need to make sure that the SMTP settings in the server are correct (and any other settings?) so that it does not lose or stop sending/receiving mail. Do you have suggestions on how to change these settings? I am not familiar with changing the settings in Exchange 2000. Thanks.
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Question by:lanehart
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Expert Comment

by:bhnmi
ID: 20322698
You need to change your MX record to reflect the change also. Is your exchange server on your LAN with a private IP address with port 25 opened to the box? If it is, you will only need to make the change to your  MX record. I would do this at asap as you are changing tomorrow.
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Author Comment

by:lanehart
ID: 20322815
Hello, Right now I have the server behind a router and firewall; port 25 is forwarded through. I am also aware of chaning the MX record to reflect the new IP. My main question, though, is whether or not there are some type of settings regarding actually sending mail that I need to change within my server. How does it know where to "go" to send the mail out? I guess I was thinking that there would be something that I need to do in terms of SMTP server or something with the ISP. Perhaps I am totally lost and this is not necessary since the Exchange server would connect to the DNS server and locate those external mail servers of other parties and then just resolve and send the messages without help of the ISPs SMTP server. Is that more accurate? Sorry to be ignorant.
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by:bhnmi
ID: 20322864
As long as the exchange server can resolve DNS queries it will send mail.
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Expert Comment

by:bhnmi
ID: 20322879
Let me rephrase that...

As long as the DNS server the Exchange server is using can resolve external host names you will be able to send mail.
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Author Comment

by:lanehart
ID: 20322892
Okay, thanks. It will be able to do that. On another note, I will need to change the DNS settings in my server. Is the only place that I have to do this on the DHCP settings? I know how to do that, but is there anywhere else?
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bhnmi earned 500 total points
ID: 20322976
You need to change your DNS settings on what server? I would just change your forwarders on you current server to the DNS server's provided by the ISP.
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Expert Comment

by:bhnmi
ID: 20322984
On your current DNS server that it.
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Author Comment

by:lanehart
ID: 20323114
Right now the router (Linksys WRT54G) is connected to the modem (will also be connected to cable modem). The DNS points back to the server (the router hands out DHCP), so I am thinking that the ISP's DNS settings need to be in the server. Where do I go to change those?
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Author Comment

by:lanehart
ID: 20323123
I'm sorry...I didn't hit refresh before re-posting! That answers my questions. I will have you the points.
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