A message could not be virus scanned – this operation will be retried later. Internet Message ID proxy address, Error Code error code.

Details
Product: Exchange
Event ID: 348
Source: MSExchangeTransport
Version: 6.5.6940.0
Component: Microsoft Exchange Transport
Message: A message could not be virus scanned – this operation will be retried later. Internet Message ID proxy address, Error Code error code.
   
Explanation

This event indicates that a message could not be scanned for viruses. This can occur if the following conditions are true:

  • An antivirus program that uses the Virus Scanning Application Program Interface (VSAPI) is running on the Exchange server.
  • The VSAPI-based antivirus program is configured to use transport scanning.
  • The message that could not be scanned is digitally signed.
   
User Action

To resolve this error, try one or both of the following:

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