When you send an Internet e-mail message under the following conditions
- Exchange Server 5.5 Service Pack 3 is installed on the server.
- Either Microsoft Exchange Client or Microsoft Outlook has the two following transport providers on the client:
- The Microsoft Exchange Transport provider.
- The Internet Mail Service provider.
- The Internet Mail Service is set first in the order of transports.
- The Exchange Server recipient is set in the To or Cc box of the e-mail message and the Internet recipient is set in the Bcc box of the e-mail message.
The Exchange Server recipient is set in the Bcc field of the e-mail message and the Internet recipient is set in the To or Cc box of the e-mail message.
the following event is logged in the application event log:
Event ID: 2078
Source: MSExchangeIS Private
Category: Transport Sending
Unable to submit, send, or transfer out a message.
Nevertheless, the message is sent without any issues.
This issue is caused by the Information Store service in Exchange Server 5.5 Service Pack 3.
PR_RESPONSIBILITY, as described in the error message event in the "Symptoms" section of this article, is a property of the
recipient and is set to True by default. After the e-mail message is sent by each
provider, the PR_RESPONSIBILITY property of the recipients who have been transmitted is set to False by each transport provider.
The Event ID 2078 error message indicates that all PR_RESPONSIBILITY properties of recipients are set to False, so no recipient exists to send a message.
When the Exchange Transport provider delivers the message to the Information Store service after it sends to the SMTP recipient by using the Internet Mail Service provider, the PR_RESPONSIBILITY property of the SMTP recipient is set to False. Therefore, the Exchange Server service provider delivers one message with the following conditions:
- The PR_RESPONSIBILITY property of the SMTP recipient in the To or Cc box is set False.
- The PR_RESPONSIBILITY property of the Exchange Server recipient in the Bcc box is set True.
In Exchange Server 5.5 Service Pack 3, the fix described in the following article separates the Bcc
XCON: Modification in X.400 Blind Copy Implementation
Event ID 2078 occurs when the Exchange Server recipient is not included in either the To
recipients or the Bcc
But in this case, the Internet Mail Service provider sends the SMTP recipient in the To
box with no issue.
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:
XGEN: How to Obtain the Latest Exchange Server 5.5 Service Pack
The following files are available for download from the Microsoft
For additional information about how to download Microsoft Support files, click the following article number to view the article in the Microsoft Knowledge Base:
How to Obtain Microsoft Support Files from Online Services
Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help to prevent any unauthorized changes to the file.
It is safe to ignore this Event when the conditions in the "Symptoms" section of this article exist.
Microsoft has confirmed that this is a problem in Microsoft Exchange Server version 5.5 Service Pack 3. This problem was first corrected in Exchange Server 5.5 Service Pack 4.