<div>
See my response and others in this question earlier today. <br />
<a href="https://www.experts-exchange.com/Software/Server_Software/Email_Servers/Exchange/Q__22490265.html" rel="ugc nofollow">https://www.experts-exchange.com/Software/Server_Software/Email_Servers/Exchange/Q__22490265.html</a><br />
<br />
Basically there is close to nothing you can do as long as the messages are not originating from your domain. <br />
<br />
Simon. 
</div>


See my response and others in this question earlier today.
https://www.experts-exchange.com/Software/Server_Software/Email_Servers/Exchange/Q__22490265.html [https://www.experts-exchange.com/Software/Server_Software/Email_Servers/Exchange/Q__22490265.html]

Basically there is close to nothing you can do as long as the messages are not originating from your domain.

Simon.

<div>
The analogy I use is;<br />
<br />
There is nothing to stop someone putting a post card in the postbox and saying its from santa clause. &nbsp;It will still get delivered. <br />
<br />
Rob<br />
<br />

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The analogy I use is;

There is nothing to stop someone putting a post card in the postbox and saying its from santa clause.  It will still get delivered.

Rob



<div>
Hmm...Well I guess theres not alot I can do then. It stinks cause when they are sent alot of the times its sent to the address for all users. For instance &quot;CentralOffice@&lt;mydomain&gt;.<wbr />com<br />
<br />
So everyone would get it. Argh, oh well.<br />
<br />
So what should I do about the points thing...
</div>


Hmm...Well I guess theres not alot I can do then. It stinks cause when they are sent alot of the times its sent to the address for all users. For instance "CentralOffice@<mydomain>.com

So everyone would get it. Argh, oh well.

So what should I do about the points thing...

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<div class="content wysiwyg-content">
We have had an issue with Spoofed emails for some time now. <br />
<br />
For instance we will recieve an email from &lt;xff@OurDomain.com&gt;<br />
<br />
How can we prevent fake emails that have our domain on the address from being sent? We run a single Exchange 2003 server with Symantec 10.0 
</div>
</div>


We have had an issue with Spoofed emails for some time now. 

For instance we will recieve an email from <xff@OurDomain.com>

How can we prevent fake emails that have our domain on the address from being sent? We run a single Exchange 2003 server with Symantec 10.0 

Spam/Spoofed Email &lt;fakeuser@ourdomain.com&gt;

Servers are computing devices that are similar to desktop computers in that they have the same basic components, but are significantly different in size, configuration and purpose. Servers are usually accessed over a network, and many run unattended, without a computer monitor, input device, audio hardware or USB interfaces. Many servers do not have a graphical user interface (GUI), and are configured and managed remotely. Servers typically include hardware redundancy such as dual power supplies, RAID disk systems, and ECC memory, along with extensive pre-boot memory testing and verification. Critical components might be hot swappable, and to guard against overheating, servers might have more powerful fans or use water cooling.

Server Hardware

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.

Spam/Spoofed Email &lt;fakeuser@ourdomain.com&gt;

Spam/Spoofed Email <fakeuser@ourdomain.com>