Article ID: 837370 - View products that this article applies to.
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When the Exchange Server 2003 component of Microsoft Windows Small Business Server 2003 processes incoming and outgoing e-mail messages that have attachments, the following event may be logged in the application log on the Small Business 2003 computer:
This behavior is caused by e-mail messages that contain MIME fields whose content type is multipart/alternative. The expected content type is multipart/mixed. Typically, e-mail messages that contain multipart/alternative content type MIME fields are the result of e-mail worms.
Less frequently, this behavior can be caused by a non-Microsoft antivirus program that is running a file-level scan of the Exchange folders. The file-level scan may remove infected attachments before Small Business Server 2003 can remove the attachment.
You can ignore these events, and you do not have to run the Configure E-mail and Internet Connection Wizard. However, if you have an antivirus program that runs a file-level scan, Microsoft recommends that you configure the file-level scan to exclude the Exchange Server folders.
For additional information about file-level antivirus scanners and Exchange Server 2003, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/823166/ )Overview of Exchange Server 2003 and antivirus software
Microsoft is researching this problem and will post more information in this article when the information becomes available.