You create a disclaimer transport rule in an environment that has Update Rollup 1 for Microsoft Exchange Server 2010 Service Pack 3 (SP3) installed.
The transport rule is applied to all messages, and appends some text to email messages.
The disclaimer transport rule tries to apply the disclaimer to an HTML-formatted message.
In this scenario, the HTML-formatted message cannot be delivered to recipients, and the EdgeTransport.exe process crashes on the Hub Transport server. Additionally, the following event is logged in the Application log:
Log Name: Application Source: MSExchange Common Date: N/A Event ID: 4999 Task Category: General Level: Error Keywords: Classic User: N/A Computer: N/ADescription: Watson report about to be sent for process id: Process ID, with parameters: E12, Build Type, Version Number, edgetransport, unknown, M.E.D.T.E.P.M.E.D.T.E.IBody.GetContentWriteStream, System.NullReferenceException, Call Stack Hash, Assembly Version. ErrorReportingEnabled: False
This issue occurs because the message body and the disclaimer text use the same character encoding. This causes an issue in which a null charset parameter is called in the character encoding.
To resolve this issue, install the following update rollup:
2866475 Description of Update Rollup 2 for Exchange Server 2010 SP3
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about a similar issue, click the following article number to view the article in the Microsoft Knowledge Base:
2870028 EdgeTransport.exe crashes when an email message without a sender address is sent to an Exchange Server 2010 Hub Transport server
For more information about the character encoding, go to the following Microsoft website: