Unable to submit, send or transfer out a message. Database “%2”. Check %1.

This Error event indicates that message delivery failed because of a malformed or missing MAPI property on the specified message.

To resolve this error, note the MAPI property that caused the failure, for example, PR_REPORT_DESTINATION_ENTRYID or PR_RESPONSIBILITY. Determine how the property was generated. Then search the Microsoft Knowledge Base for the MAPI property that caused the failure. If the problem persists, contact Microsoft Customer Support Services. For information about how to contact support, visit Microsoft Help and Support.

If you are not already doing so, consider running the tools that Microsoft Exchange offers to help administrators analyze and troubleshoot their Exchange environment. These tools can help you make sure that your configuration is in line with Microsoft best practices. They can also help you identify and resolve performance issues, improve mail flow, and better manage disaster recovery scenarios. Go to the Toolbox node of the Exchange Management Console to run these tools now. For more information about these tools, see Toolbox in the Exchange Server 2007 Help.