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Also i can tell that mail is getting to the gateway but is being rejected (i assume because it can't find email server)
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Also i can tell that mail is getting to the gateway but is being rejected (i assume because it can't find email server)

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MTA used to be like XXX1 and is now XXX.1.com (linux made me add the .com for virtual server)
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MTA used to be like XXX1 and is now XXX.1.com (linux made me add the .com for virtual server)

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so by fully qualified domain name i should include our domain in the name, because i can't actually add the computer name to the domain like windows... say domain was 1234abc for all the computers the gateway should be smtp1.1234abc.dns right?
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so by fully qualified domain name i should include our domain in the name, because i can't actually add the computer name to the domain like windows... say domain was 1234abc for all the computers the gateway should be smtp1.1234abc.dns right?

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Domain on linux was problem.
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Do you have to specify the domain of a gateway to an email server (exchange 2003). I just recently updated from Symantec Brightmail on Windows 2000 to Symantec brightmail 9.0.2 on Linux. I have all the same Ips set up to deliver the mail. However there's two items that are different. The domain of the Gateway and also linux has somthing called a &quot;broadcast&quot; ip, not sure what that is. Where would i change on Windows 2003, exchange 2003 where it should be getting its filtered mail from? 
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Do you have to specify the domain of a gateway to an email server (exchange 2003). I just recently updated from Symantec Brightmail on Windows 2000 to Symantec brightmail 9.0.2 on Linux. I have all the same Ips set up to deliver the mail. However there's two items that are different. The domain of the Gateway and also linux has somthing called a "broadcast" ip, not sure what that is. Where would i change on Windows 2003, exchange 2003 where it should be getting its filtered mail from? 

Accepting mail from new gateway, Exchange 2003.

Windows Server 2003 was based on Windows XP and was released in four editions: Web, Standard, Enterprise and Datacenter. It also had derivative versions for clusters, storage and Microsoft’s Small Business Server. Important upgrades included integrating Internet Information Services (IIS), improvements to Active Directory (AD) and Group Policy (GP), and the migration to Automated System Recovery (ASR).

Windows Server 2003

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

Within Internet message handling services (MHS), a message transfer agent or mail transfer agent (MTA) or mail relay is software that transfers electronic mail messages from one computer to another using a client–server application architecture. A MTA implements both the client (sending) and server (receiving) portions of the Simple Mail Transfer Protocol (SMTP). The terms mail server, mail exchanger, and MX host may also refer to a computer performing the MTA function. The Domain Name System (DNS) associates a mail server to a domain with mail exchanger (MX) resource records containing the domain name of a host providing MTA services.