And, you may have to call your ISP and have them update their DNS servers for your MX Records... need to make sure your domain mail can find the right IPAddress... :)
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Setting up Email Server at home
I'd like to setup an email server at my home for development purposes.
My configuration is:
Internet ->
Zyxel Firewall Modem ->
2003 SBS Server [A] 192.168.0.199 ->
Router ->
PC
PC
Laptop
2003 Server [B] 192.168.100.26
I have a static public IP address allocated by my ISP.
What I want to do is run the email sever (Mail Enable Professional) on '2003 Server [B]' So that for externally hosted domains I'll modify the DNS A record for mail to point to my static IP Address, which will allow the emails to be processed by 2003 Server [B].
I've setup up the Zyxel Firewall Modem to forward port 25.
Am I correct in thinking as long as 2003 Server [B] is listening on port 25 then email processing will 'pass' through 2003 SBS Server [A] and be grabbed by 2003 Server [B]?
Cheers
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Answers
I assume the SBS has 2 NIC's and acts as a gateway for the rest of the network. You will need to change your configuration. SBS will not be able to forward the e-mail traffic to the other mail server.
Server B, as should all servers, should have a static (internal) address and be available from the router so that the port 25 traffic can be forwarded directly to it.
Just make sure that your ISP does not filter port 25 on residential internet accounts. This used to be quite common in certain areas, and you'll go crazy trying to figue out what is wrong.
as far as DNS, FatalException is correct. Mail uses MX records, not A records for mail exchange. But in truth you will need to make sure the A and PTR records are correct as well. Reverse lookups on mail servers are very common these days, and the PTR record is managed by your ISP since they issued you the IP. The MX and A records are managed by the owner of the domain, or whoever they selected to manager it for them. (Usually Domain Registrar or ISP)
Once all that is done, you should start seeing mail traffic hit the router.
Also, since the mail server will be using an internal name and IP, you'll want to manually configure the computer to use the external name and IP in HELO responses.
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by: RobWillPosted on 2008-01-09 at 15:12:03ID: 20623480
So long as the firewall forwards port 25 to the appropriate server it will work fine, the other Exchange/SBS server will not receive any e-mail traffic.
Also make sure your mail client (Outlook) is set up to use the right mail service/account as well, for sending.