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No, I haven't tried that.. &nbsp;I will and get back to you on here.. &nbsp;Thank you!
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No, I haven't tried that..  I will and get back to you on here..  Thank you!

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Well, this seems to have solved my problem. &nbsp;Thank you!
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Well, this seems to have solved my problem.  Thank you!

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I am running Exchange 2007. &nbsp;I have one user who is spamming out from his email. &nbsp;I have scanned his machine with multiple scanners and his machine is coming back clean. &nbsp;I have turned off all of his equipment (laptop, iPhone and iPad) and the emails keep being sent through my server with his email address. I have ran multiple scans on my Exchange server and it comes back clean. &nbsp;I have used sites like MXToolBox to verify I'm not an Open Relay and those come back good. &nbsp;<br />
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When I look at the message queue on the server, I notice in the column that says &quot;Message Source Name&quot; when there are legitimate emails being sent from other users, that column says &quot;Local&quot;. &nbsp;When there are SPAM messages being sent or held up, the &quot;Message Source Name&quot; column says &quot;SMTP:Default-<i>servername</i>&quot; &nbsp;<br />
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I cannot figure out how to find the reason for all of these SPAM messages. &nbsp;Any help would be appreciated.
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I am running Exchange 2007.  I have one user who is spamming out from his email.  I have scanned his machine with multiple scanners and his machine is coming back clean.  I have turned off all of his equipment (laptop, iPhone and iPad) and the emails keep being sent through my server with his email address. I have ran multiple scans on my Exchange server and it comes back clean.  I have used sites like MXToolBox to verify I'm not an Open Relay and those come back good.  

When I look at the message queue on the server, I notice in the column that says "Message Source Name" when there are legitimate emails being sent from other users, that column says "Local".  When there are SPAM messages being sent or held up, the "Message Source Name" column says "SMTP:Default-servername"  

I cannot figure out how to find the reason for all of these SPAM messages.  Any help would be appreciated.

SPAM emails being sent

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.

Email Servers

An email client, email reader or more formally mail user agent (MUA) is a computer program in the category of groupware environments used to access and manage a user's email. A web application that provides message management, composition, and reception functions may internally act as an email client; as a whole, it is commonly referred to as webmail. Likewise, email client may be referred to a piece of computer hardware or software whose primary or most visible role is to work as an email client. Email clients can also have other systems, like calendars, notes and contact managers.