I do not understand exactly your problem.
Is someone using one of your emails to send spam? from the user's machine?
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Spam
We are running Exchange 2003. One of our email addresses is sending out spam. We are having a hard time identifying the address that has been hijacked. Is there a software or other method for identifying the address that is generating it. It is flooding my system. HELP!!!!
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Answers
When you say it is flooding your system--can you see outgoing messages in the queue that are spawn or is it inbound NDRs that are flooding you?
Is it possible that it is actually just a "Joe-Job"? This is when someone, using a completely different server, uses someone elses email account in the "from" line.
If you are receiving NDRs from outside, you can examine the headers to see where the mail originated--whether it was inside your organization or external.
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by: SembeePosted on 2006-11-27 at 10:56:24ID: 18021535
How have you identified this problem?
One of your accounts has probably been compromised. If you haven't already, change your administrator password and then restart the SMTP service.
Then take a look at my spam cleanup article. http://www.amset.info/exch
Simon.