The EdgeTransport.exe process crashes when processing certain email messages on an Exchange Server 2007 Hub Transport server

Article ID: 2556751 - View products that this article applies to.
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SYMPTOMS

Assume that you send or receive an email message that has a multipart/mixed content type and inline content disposition in a Microsoft Exchange Server 2007 environment. For example, you use an Apple device to send an email message that contains a body that resembles the following:
<text>
<image>
<text>
In this situation, the EdgeTransport.exe process on the Hub Transport server crashes. Additionally, the following events are logged in the Application log:
Log Name: Application
Source: MSExchange Common
Date: <Date>
Event ID: 4999
Task Category: General
Level: Error
Keywords: Classic
User: N/A
Computer: <Computer>
Description:
Watson report about to be sent to dw20.exe for process id: <ProcessID>, with parameters: E12, c-RTL-AMD64, <version number>, edgetransport, M.E.D.Storage, M.E.D.S.InboundMimeConverter.DetermineMixedContentEncoding, System.NullReferenceException, <XXXX>, <version number>. ErrorReportingEnabled: False

Log Name: Application
Source: MSExchangeTransport
Date: <Date>
Event ID: 10003
Task Category: PoisonMessage
Level: Error
Keywords: Classic
User: N/A
Computer: <Computer>
Description:
The transport process failed during message processing with the following call stack: System.NullReferenceException: Object reference not set to an instance of an object.
at Microsoft.Exchange.Data.Storage.InboundMimeConverter.DetermineMixedContentEncoding()
at Microsoft.Exchange.Data.Storage.InboundMimeConverter.PromoteMimeMessageMixedBody()
at Microsoft.Exchange.Data.Storage.InboundMimeConverter.PromoteDelayedBody(Item item, Boolean promoteEmptyBody)
at Microsoft.Exchange.Data.Storage.InboundMimeConverter.ConvertToItemInternal(MimePromotionFlags promotionFlags)
at Microsoft.Exchange.Data.Storage.InboundMimeConverter.<>c__DisplayClasse.<ConvertToItem>b__c()
at Microsoft.Exchange.Data.Storage.ConvertUtils.CallCts(Trace tracer, String methodName, String exceptionString, CtsCall ctsCall)
at Microsoft.Exchange.Data.Storage.InboundMimeConverter.ConvertToItem(MimePromotionFlags promotionFlags)
at Microsoft.Exchange.Data.Storage.ItemConversion.InternalConvertAnyMimeToItem(Item itemOut, EmailMessage messageIn, InboundConversionOptions options, MimePromotionFlags promotionFlags, Boolean isStreamToStream)
at Microsoft.Exchange.Data.Storage.ItemConversion.ConvertAnyMimeToItem(Item itemOut, EmailMessage messageIn, InboundConversionOptions options, MimePromotionFlags flags)
at Microsoft.Exchange.Data.Storage.ItemConversion.ConvertAnyMimeToItem(Item itemOut, EmailMessage messageIn, InboundConversionOptions options)
at Microsoft.Exchange.MailboxTransport.StoreDriver.DeliveryItem.ConvertFromAnyMime(EmailMessage message, InboundConversionOptions options)
at Microsoft.Exchange.MailboxTransport.StoreDriver.MailItemDeliver.CopyContentToItem(MailRecipient recipient)
at Microsoft.Exchange.MailboxTransport.StoreDriver.MailItemDeliver.<>c__DisplayClass1.<DeliverToRecipient>b__0()
at Microsoft.Exchange.MailboxTransport.StoreDriver.StorageExceptionHandler.RunUnderExceptionHandler(IMessageConverter converter, StoreDriverDelegate workerFunction)
at Microsoft.Exchange.MailboxTransport.StoreDriver.MailItemDeliver.DeliverToRecipient(MailRecipient recipient)
at Microsoft.Exchange.MailboxTransport.StoreDriver.MailItemDeliver.DeliverToRecipients()
at Microsoft.Exchange.MailboxTransport.StoreDriver.StoreDriver.DeliverMailItem(NextHopConnection connection, TransportMailItem mailItem)
at Microsoft.Exchange.MailboxTransport.StoreDriver.StoreDriver.LocalDeliveryCallback(Object state)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading._ThreadPoolWaitCallback.PerformWaitCallbackInternal(_ThreadPoolWaitCallback tpWaitCallBack)
at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback(Object state)


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CAUSE

This issue occurs because an InvalidCastException exception occurs when the Hub Transport server processes email messages. This behavior causes the Edge Transport.exe process to crash.
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RESOLUTION

To resolve this issue, install the following update rollup:
2602324
(http://support.microsoft.com/kb/2602324/ )
Description of Update Rollup 5 for Exchange Server 2007 Service Pack 3
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STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
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MORE INFORMATION

For more information about the multipart content type, visit the following Microsoft website:
General information about the multipart content type
(http://msdn.microsoft.com/en-us/library/aa493937.aspx)
For more information about inline content, visit the following Microsoft website:
General information about inline content
(http://msdn.microsoft.com/en-us/library/aa563328.aspx)
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Properties

Article ID: 2556751 - Last Review: September 26, 2011 - Revision: 5.0
APPLIES TO
  • Microsoft Exchange Server 2007 Service Pack 3, when used with:
    • Microsoft Exchange Server 2007 Standard Edition
    • Microsoft Exchange Server 2007 Enterprise Edition
Keywords: 
kbfix kbqfe kbsurveynew kbexpertiseinter KB2556751
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