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The Microsoft Exchange 5.5 Server Message Transfer Agent (MTA) may experience content conversion failures on certain e-mail messages. Event ID 210 messages that are similar to the following are logged in the application log of Event Viewer:
Event ID: 210 Source: MSExchangeMTA Type: Warning Description: An internal MTA error occurred. Content conversion for message message failed.
When this event is logged, the e-mail messages do not reach their destination. Additionally, non-delivery reports (NDR) that are similar to the following are received by the sender of the e-mail messages:
The following recipient(s) could not be reached:
UserName on Date and Time A syntax error was detected in the content of the message The MTS-ID of the original message is: c=US;a=xyz;l=SERVER1-030403142356Z-6678 MSEXCH:MSExchangeMTA:Site:Server
This problem may occur when the messages contain Microsoft Database Format (MDBEF) encoding that is incorrectly formatted. The MDBEF encoding contains MAPI properties that do not belong to certain contexts. This problem may occur if either one of the following conditions is true:
The MDBEF encoding contains the PR_NORMALIZED_SUBJECT MAPI property in a recipient context.
The MDBEF encoding contains the PR_EMAIL_ADDRESS MAPI property in a non-recipient context.
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that this article describes. Apply it only to systems that are experiencing this specific problem.
To resolve this problem, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, visit the following Microsoft Web site:
Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.
This hotfix requires Microsoft Exchange Server 5.5 Service Pack 4 (SP4).
You do not have to restart your computer after you apply this hotfix.
The English version of this hotfix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.