Config SBS 03 to receive/send email for two domains

Hi there, I would appreciate any help with the following configuration

Heres the scenario,

My client Domain1 ( have re branded as Domain2 (  
They currently have SBS2003, this server is their Exchange mail server also.

The configuration off the mail is that the MX records point to Email Systems Ltd for Spam + Virus removal, from here their forward to which resolves to their exchange mail server.  Port 25 is open to only them on the Sonicwall unit.

What I need if possible, is for the server to receive email for each local client for the two above domains, also when the local client sends an e-mail it must be from the new domain  

I host the domains, so I have access to the DNS off the domains.

Is this setup possible?
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Jeffrey Kane - TechSoEasyConnect With a Mentor Principal ConsultantCommented:

I don't know what "issues" you are thinking would be caused... but the article by Sean Daniel is EXACTLY what you need.

But first you need to change the PRIMARY email domain to Domain2.  You do that by running the Configure Email and Internet Connection Wizard (CEICW -- which is linked as Connect to the Internet in the Server Management Console > To-Do List) and changing the email domain name to the new one.

A visual how-to for the CEICW is here:

Then, follow the steps outlined in to add the original domain name back as a second email domain.

If they want to be able to still send from Domain1 after you've reconfigured this, then see for a workaround to allow sending from any address they have configured.

Yes it is. SBS only have limitations to the number of domains on the internal network.
You have to create new connections on the POP3 Connector to download the new mail accounts into the desired mailboxes.

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pbgormleyAuthor Commented:
Thanks guys,

I've reviewed both links but they seem to suggest that sending on the second domain causes issues....

I'll try and see how it goes.

Any other links/config procedures?
Mark DamenERP System ManagerCommented:
Ive seen SBS 2003 running two domains, all mail being delivered by SMTP and send via DNS.  Simply ensure that the correct "sending" address is set as primary in the users account in AD.  They will be able to get mail in for any of the listed address in AD.

pbgormleyAuthor Commented:
Jeff, thanks for the excellent advice.

I'll give this a whirl this weekend and let you know how it all goes.
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