A sender receives an NDR from the Exchange 2007 server when the sender submits a private message by using an SMTP server

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SYMPTOMS

A private message is submitted by a sender who is using an SMTP server, such as a Microsoft Exchange Server 2003-based server. The private message is sent to an Exchange 2007 recipient whose mailbox is configured to forward e-mail messages to another recipient. In this scenario, the sender receives a non-deliver report (NDR) from the Exchange 2007 server. The NDR resembles the following message:

The following recipient(s) could not be reached: <user name> on <date, time> Unable to deliver the message because the originator prohibited redirection to an alternate recipient or the message was encrypted <<server name> #5.7.300 smtp;550 5.7.300 RESOLVER.FWD.Blocked; the sender prohibited alt recipient redirection on this message>

Note To send a private message in the Outlook client, you can select Private from the Sensitivity drop-down list under Message Options.

RESOLUTION

Download and then install Update Rollup 5 for Exchange 2007 Service Pack 1.

For more information about Update Rollup 5 for Exchange 2007 Service Pack 1, click the following article number to view the article in the Microsoft Knowledge Base:

953467 (http://support.microsoft.com/kb/953467/ ) Description of Update Rollup 5 for Exchange Server 2007 Service Pack 1