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On your Microsoft Windows Small Business Server (SBS) 2003-based computer, many unexpected e-mail messages may appear in the Microsoft Exchange Server 2003 SMTP queues waiting to be sent to external recipients.
This problem occurs because of the way that the POP3 connector processes certain messages that it downloads from a POP3 server. The SBS 2003 POP3 connector may incorrectly re-send certain messages to recipients who are not part of your SBS 2003 e-mail domain. Because of this, Microsoft recommends that you install the update that is described in the "Resolution" section even if you do not experience this problem.
To resolve this problem, install the update that is available from the following Microsoft Download Center Web site.
For additional information about how to download Microsoft Support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591 How to Obtain Microsoft Support Files from Online Services
Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help to prevent any unauthorized changes to the file.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.