Microsoft KB Archive/270695

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Knowledge Base

XADM: MTA Logs Content Conversion Error 4096 for an Inbound Message

Article ID: 270695

Article Last Modified on 10/26/2006


  • Microsoft Exchange Server 5.5 Standard Edition

This article was previously published under Q270695


When receiving a message from a foreign X.400 system, the Microsoft Exchange Server message transfer agent (MTA) may log an event similar to the following:

Source : MSExchangeMTA
Type : Warning
Category : X.400 Service
Event ID: 210
An internal MTA error occurred. Content conversion for message C=C;A=admd;P=prmd;L=ID failed. Conversion error: 4096, Object at fault: 0600006C, Original content type: 56010A01, New content type: 2A864886F7140501. PDU dump reference 23224 [MTA DISP:RESULT 22 112] (14)

After this event, you also see Event ID 290, which indicates that a non-delivery report (NDR) was sent for the message.


The inbound message contained an attachment of zero length. The Exchange MTA was unable to decode this attachment correctly, resulting in the conversion failure.


To resolve this problem, obtain the latest service pack for Exchange Server 5.5. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

191014 XGEN: How to Obtain the latest Exchange Server 5.5 Service Pack


Microsoft has confirmed that this is a problem in Microsoft Exchange Server version 5.5. This problem was first corrected in Exchange Server 5.5 Service Pack 4.

Keywords: kbbug kbexchange550presp4fix kbexchange550sp4fix kbfix kbqfe KB270695