Article ID: 2645587 - View products that this article applies to.
Assume that you send an external email message that has valid recipients and invalid recipients (for example, recipients that have empty email addresses) in a Microsoft Exchange Server 2010 environment. One of the recipients is a mail-enabled public folder. In this situation, the email message is not delivered to the mail-enabled public folder, and you do not receive a non-delivery report (NDR) message.
This issue occurs because the Exchange Server 2010 server stops the message delivery process only for mail-enabled public folders and not for mailbox users when the Exchange server checks the recipient list and encounters an error.
To resolve this issue, install the following update rollup:
2661854After you apply this update, email messages now are still not delivered to public folder recipients. However, a NDR message is generated.
(http://support.microsoft.com/kb/2661854/ )Description of Update Rollup 2 for Exchange Server 2010 Service Pack 2
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Article ID: 2645587 - Last Review: July 15, 2014 - Revision: 4.0